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Move static helper routines from arm_addrenv.c and may them global so that they can be shared both forthcoming stack address environment logic.
This commit is contained in:
Gregory Nutt
+1
-1
@@ -235,7 +235,7 @@ config ARCH_STACK_DYNAMIC
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general meaning of this configuration environment is simply that the
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stack has its own address space.
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NOTE: This options is also *required* if BUILD_KERNEL and
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NOTE: This option is also *required* if BUILD_KERNEL and
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LIBC_EXECFUNCS are selected. Why? Because the caller's stack must
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be preserved in its own address space when we instantiate the
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environment of the new process in order to initialize it.
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@@ -91,7 +91,7 @@ CMN_CSRCS += up_task_start.c up_pthread_start.c up_signal_dispatch.c
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endif
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ifeq ($(CONFIG_ARCH_ADDRENV),y)
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CMN_CSRCS += arm_addrenv.c arm_pgalloc.c
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CMN_CSRCS += arm_addrenv.c arm_addrenv_utils.c arm_pgalloc.c
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endif
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ifeq ($(CONFIG_ELF),y)
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@@ -0,0 +1,131 @@
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/****************************************************************************
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* arch/arm/src/armv7-a/addrenv.h
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __ARCH_ARM_SRC_ARMV7_A_ADDRENV_H
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#define __ARCH_ARM_SRC_ARMV7_A_ADDRENV_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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#include <stdint.h>
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#ifdef CONFIG_ARCH_ADDRENV
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Using a 4KiB page size, each 1MiB section maps to a PTE containing
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* 256*2KiB entries
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*/
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#define ENTRIES_PER_L2TABLE 256
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/****************************************************************************
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* Inline Functions
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#endif /* __ASSEMBLY__ */
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/****************************************************************************
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* Public Variables
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****************************************************************************/
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#ifndef __ASSEMBLY__
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#ifdef __cplusplus
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Name: set_l2_entry
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*
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* Description:
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* Set the L2 table entry as part of the initialization of the L2 Page
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* table.
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*
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****************************************************************************/
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void set_l2_entry(FAR uint32_t *l2table, uintptr_t paddr, uintptr_t vaddr,
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uint32_t mmuflags);
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/****************************************************************************
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* Name: arm_addrenv_create_region
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*
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* Description:
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* Create one memory region.
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*
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* Returned Value:
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* On success, the number of pages allocated is returned. Otherwise, a
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* negated errno value is returned.
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*
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****************************************************************************/
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int arm_addrenv_create_region(FAR uintptr_t **list, unsigned int listlen,
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uintptr_t vaddr, size_t regionsize,
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uint32_t mmuflags);
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/****************************************************************************
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* Name: arm_addrenv_destroy_region
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*
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* Description:
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* Destroy one memory region.
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*
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****************************************************************************/
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void arm_addrenv_destroy_region(FAR uintptr_t **list, unsigned int listlen,
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uintptr_t vaddr);
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#undef EXTERN
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#ifdef __cplusplus
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}
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#endif
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#endif /* __ASSEMBLY__ */
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#endif /* CONFIG_ARCH_ADDRENV */
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#endif /* __ARCH_ARM_SRC_ARMV7_A_ADDRENV_H */
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@@ -63,6 +63,27 @@
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* up_addrenv_detach - Release the threads reference to an address
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* environment when a task/thread exits.
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*
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* CONFIG_ARCH_STACK_DYNAMIC=y indicates that the user process stack resides
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* in its own address space. This options is also *required* if
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* CONFIG_BUILD_KERNEL and CONFIG_LIBC_EXECFUNCS are selected. Why?
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* Because the caller's stack must be preserved in its own address space
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* when we instantiate the environment of the new process in order to
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* initialize it.
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*
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* NOTE: The naming of the CONFIG_ARCH_STACK_DYNAMIC selection implies that
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* dynamic stack allocation is supported. Certainly this option must be set
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* if dynamic stack allocation is supported by a platform. But the more
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* general meaning of this configuration environment is simply that the
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* stack has its own address space.
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*
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* If CONFIG_ARCH_STACK_DYNAMIC=y is selected then the platform specific
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* code must export these additional interfaces:
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*
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* up_addrenv_stackalloc - Create a stack address environment
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* up_addrenv_stackfree - Destroy a stack address environment.
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* up_addrenv_vstack - Returns the virtual base address of the stack
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* up_addrenv_stackselect - Instantiate a stack address environment
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*
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****************************************************************************/
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/****************************************************************************
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@@ -72,18 +93,19 @@
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#include <nuttx/config.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/addrenv.h>
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#include <arch/arch.h>
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#include <nuttx/arch.h>
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#include <nuttx/pgalloc.h>
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#include <arch/irq.h>
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#include "pginline.h"
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#include "cache.h"
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#include "mmu.h"
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#include "pginline.h"
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#include "addrenv.h"
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#ifdef CONFIG_ARCH_ADDRENV
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@@ -104,12 +126,6 @@
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# error CONFIG_ARCH_HEAP_VBASE not aligned to section boundary
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#endif
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/* Using a 4KiB page size, each 1MiB section maps to a PTE containing
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* 256*2KiB entries
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*/
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#define ENTRIES_PER_L2TABLE 256
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/****************************************************************************
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* Private Data
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****************************************************************************/
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@@ -118,156 +134,6 @@
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: set_l2_entry
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*
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* Description:
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* Set the L2 table entry as part of the initialization of the L2 Page
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* table.
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*
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****************************************************************************/
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static void set_l2_entry(FAR uint32_t *l2table, uintptr_t paddr,
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uintptr_t vaddr, uint32_t mmuflags)
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{
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uint32_t index;
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/* The table divides a 1Mb address space up into 256 entries, each
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* corresponding to 4Kb of address space. The page table index is
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* related to the offset from the beginning of 1Mb region.
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*/
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index = (vaddr & 0x000ff000) >> 12;
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/* Save the table entry */
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l2table[index] = (paddr | mmuflags);
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}
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/****************************************************************************
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* Name: up_addrenv_create_region
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*
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* Description:
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* Create one memory region.
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*
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* Returned Value:
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* On success, the number of pages allocated is returned. Otherwise, a
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* negated errno value is returned.
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*
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****************************************************************************/
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static int up_addrenv_create_region(FAR uintptr_t **list,
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unsigned int listlen, uintptr_t vaddr,
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size_t regionsize, uint32_t mmuflags)
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{
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irqstate_t flags;
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uintptr_t paddr;
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FAR uint32_t *l2table;
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#ifndef CONFIG_ARCH_PGPOOL_MAPPING
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uint32_t l1save;
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#endif
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size_t nmapped;
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unsigned int npages;
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unsigned int i;
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unsigned int j;
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bvdbg("listlen=%d vaddr=%08lx regionsize=%ld, mmuflags=%08x\n",
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listlen, (unsigned long)vaddr, (unsigned long)regionsize,
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(unsigned int)mmuflags);
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/* Verify that we are configured with enough virtual address space to
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* support this memory region.
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*
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* npages pages correspondes to (npages << MM_PGSHIFT) bytes
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* listlen sections corresponds to (listlen << 20) bytes
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*/
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npages = MM_NPAGES(regionsize);
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if (npages > (listlen << (20 - MM_PGSHIFT)))
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{
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bdbg("ERROR: npages=%u listlen=%u\n", npages, listlen);
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return -E2BIG;
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}
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/* Back the allocation up with physical pages and set up the level mapping
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* (which of course does nothing until the L2 page table is hooked into
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* the L1 page table).
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*/
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nmapped = 0;
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for (i = 0; i < npages; i += ENTRIES_PER_L2TABLE)
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{
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/* Allocate one physical page for the L2 page table */
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paddr = mm_pgalloc(1);
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if (!paddr)
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{
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return -ENOMEM;
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}
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DEBUGASSERT(MM_ISALIGNED(paddr));
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list[i] = (FAR uintptr_t *)paddr;
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flags = irqsave();
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#ifdef CONFIG_ARCH_PGPOOL_MAPPING
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/* Get the virtual address corresponding to the physical page address */
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l2table = (FAR uint32_t *)arm_pgvaddr(paddr);
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#else
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/* Temporarily map the page into the virtual address space */
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l1save = mmu_l1_getentry(ARCH_SCRATCH_VBASE);
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mmu_l1_setentry(paddr & ~SECTION_MASK, ARCH_SCRATCH_VBASE, MMU_MEMFLAGS);
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l2table = (FAR uint32_t *)(ARCH_SCRATCH_VBASE | (paddr & SECTION_MASK));
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#endif
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/* Initialize the page table */
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memset(l2table, 0, ENTRIES_PER_L2TABLE * sizeof(uint32_t));
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/* Back up L2 entries with physical memory */
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for (j = 0; j < ENTRIES_PER_L2TABLE && nmapped < regionsize; j++)
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{
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/* Allocate one physical page for region data */
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paddr = mm_pgalloc(1);
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if (!paddr)
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{
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#ifndef CONFIG_ARCH_PGPOOL_MAPPING
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mmu_l1_restore(ARCH_SCRATCH_VBASE, l1save);
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#endif
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irqrestore(flags);
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return -ENOMEM;
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}
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/* Map the .text region virtual address to this physical address */
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set_l2_entry(l2table, paddr, vaddr, mmuflags);
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nmapped += MM_PGSIZE;
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vaddr += MM_PGSIZE;
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}
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/* Make sure that the initialized L2 table is flushed to physical
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* memory.
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*/
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arch_flush_dcache((uintptr_t)l2table,
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(uintptr_t)l2table +
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ENTRIES_PER_L2TABLE * sizeof(uint32_t));
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#ifndef CONFIG_ARCH_PGPOOL_MAPPING
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/* Restore the scratch section L1 page table entry */
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mmu_l1_restore(ARCH_SCRATCH_VBASE, l1save);
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#endif
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irqrestore(flags);
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}
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return npages;
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}
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/****************************************************************************
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* Name: up_addrenv_initdata
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*
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@@ -344,79 +210,6 @@ static int up_addrenv_initdata(uintptr_t l2table)
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}
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#endif /* CONFIG_BUILD_KERNEL */
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/****************************************************************************
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* Name: up_addrenv_destroy_region
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*
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* Description:
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* Destroy one memory region.
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*
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****************************************************************************/
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static void up_addrenv_destroy_region(FAR uintptr_t **list,
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unsigned int listlen, uintptr_t vaddr)
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{
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irqstate_t flags;
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uintptr_t paddr;
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FAR uint32_t *l2table;
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#ifndef CONFIG_ARCH_PGPOOL_MAPPING
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uint32_t l1save;
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#endif
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int i;
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int j;
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bvdbg("listlen=%d vaddr=%08lx\n", listlen, (unsigned long)vaddr);
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for (i = 0; i < listlen; vaddr += SECTION_SIZE, list++, i++)
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{
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/* Unhook the L2 page table from the L1 page table */
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mmu_l1_clrentry(vaddr);
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/* Has this page table been allocated? */
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paddr = (uintptr_t)list[i];
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if (paddr != 0)
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{
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flags = irqsave();
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#ifdef CONFIG_ARCH_PGPOOL_MAPPING
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/* Get the virtual address corresponding to the physical page address */
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l2table = (FAR uint32_t *)arm_pgvaddr(paddr);
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#else
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/* Temporarily map the page into the virtual address space */
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l1save = mmu_l1_getentry(ARCH_SCRATCH_VBASE);
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mmu_l1_setentry(paddr & ~SECTION_MASK, ARCH_SCRATCH_VBASE, MMU_MEMFLAGS);
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l2table = (FAR uint32_t *)(ARCH_SCRATCH_VBASE | (paddr & SECTION_MASK));
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#endif
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/* Return the allocated pages to the page allocator */
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for (j = 0; j < ENTRIES_PER_L2TABLE; j++)
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{
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paddr = *l2table++;
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if (paddr != 0)
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{
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paddr &= PTE_SMALL_PADDR_MASK;
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mm_pgfree(paddr, 1);
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}
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}
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#ifndef CONFIG_ARCH_PGPOOL_MAPPING
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/* Restore the scratch section L1 page table entry */
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mmu_l1_restore(ARCH_SCRATCH_VBASE, l1save);
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#endif
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irqrestore(flags);
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/* And free the L2 page table itself */
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mm_pgfree((uintptr_t)list[i], 1);
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}
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}
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||||
}
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||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
@@ -469,9 +262,9 @@ int up_addrenv_create(size_t textsize, size_t datasize, size_t heapsize,
|
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/* Allocate .text space pages */
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ret = up_addrenv_create_region(addrenv->text, ARCH_TEXT_NSECTS,
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CONFIG_ARCH_TEXT_VBASE, textsize,
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MMU_L2_UTEXTFLAGS);
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ret = arm_addrenv_create_region(addrenv->text, ARCH_TEXT_NSECTS,
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CONFIG_ARCH_TEXT_VBASE, textsize,
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MMU_L2_UTEXTFLAGS);
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if (ret < 0)
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{
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bdbg("ERROR: Failed to create .text region: %d\n", ret);
|
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@@ -483,10 +276,10 @@ int up_addrenv_create(size_t textsize, size_t datasize, size_t heapsize,
|
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* used when reporting the virtual data address in up_addrenv_vdata().
|
||||
*/
|
||||
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ret = up_addrenv_create_region(addrenv->data, ARCH_DATA_NSECTS,
|
||||
CONFIG_ARCH_DATA_VBASE,
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datasize + ARCH_DATA_RESERVE_SIZE,
|
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MMU_L2_UDATAFLAGS);
|
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ret = arm_addrenv_create_region(addrenv->data, ARCH_DATA_NSECTS,
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CONFIG_ARCH_DATA_VBASE,
|
||||
datasize + ARCH_DATA_RESERVE_SIZE,
|
||||
MMU_L2_UDATAFLAGS);
|
||||
if (ret < 0)
|
||||
{
|
||||
bdbg("ERROR: Failed to create .bss/.data region: %d\n", ret);
|
||||
@@ -509,9 +302,9 @@ int up_addrenv_create(size_t textsize, size_t datasize, size_t heapsize,
|
||||
#ifdef CONFIG_BUILD_KERNEL
|
||||
/* Allocate heap space pages */
|
||||
|
||||
ret = up_addrenv_create_region(addrenv->heap, ARCH_HEAP_NSECTS,
|
||||
CONFIG_ARCH_HEAP_VBASE, heapsize,
|
||||
MMU_L2_UDATAFLAGS);
|
||||
ret = arm_addrenv_create_region(addrenv->heap, ARCH_HEAP_NSECTS,
|
||||
CONFIG_ARCH_HEAP_VBASE, heapsize,
|
||||
MMU_L2_UDATAFLAGS);
|
||||
if (ret < 0)
|
||||
{
|
||||
bdbg("ERROR: Failed to create heap region: %d\n", ret);
|
||||
@@ -554,19 +347,19 @@ int up_addrenv_destroy(FAR group_addrenv_t *addrenv)
|
||||
|
||||
/* Destroy the .text region */
|
||||
|
||||
up_addrenv_destroy_region(addrenv->text, ARCH_TEXT_NSECTS,
|
||||
CONFIG_ARCH_TEXT_VBASE);
|
||||
arm_addrenv_destroy_region(addrenv->text, ARCH_TEXT_NSECTS,
|
||||
CONFIG_ARCH_TEXT_VBASE);
|
||||
|
||||
/* Destroy the .bss/.data region */
|
||||
|
||||
up_addrenv_destroy_region(addrenv->data, ARCH_DATA_NSECTS,
|
||||
CONFIG_ARCH_DATA_VBASE);
|
||||
arm_addrenv_destroy_region(addrenv->data, ARCH_DATA_NSECTS,
|
||||
CONFIG_ARCH_DATA_VBASE);
|
||||
|
||||
#ifdef CONFIG_BUILD_KERNEL
|
||||
/* Destroy the heap region */
|
||||
|
||||
up_addrenv_destroy_region(addrenv->heap, ARCH_HEAP_NSECTS,
|
||||
CONFIG_ARCH_HEAP_VBASE);
|
||||
arm_addrenv_destroy_region(addrenv->heap, ARCH_HEAP_NSECTS,
|
||||
CONFIG_ARCH_HEAP_VBASE);
|
||||
|
||||
memset(addrenv, 0, sizeof(group_addrenv_t));
|
||||
#endif
|
||||
|
||||
@@ -0,0 +1,295 @@
|
||||
/****************************************************************************
|
||||
* arch/arm/src/armv7/arm_addrenv.c
|
||||
*
|
||||
* Copyright (C) 2014 Gregory Nutt. All rights reserved.
|
||||
* Author: Gregory Nutt <gnutt@nuttx.org>
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in
|
||||
* the documentation and/or other materials provided with the
|
||||
* distribution.
|
||||
* 3. Neither the name NuttX nor the names of its contributors may be
|
||||
* used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||||
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||||
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||||
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||||
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||||
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||||
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
||||
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
||||
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*
|
||||
****************************************************************************/
|
||||
/****************************************************************************
|
||||
* Included Files
|
||||
****************************************************************************/
|
||||
|
||||
#include <nuttx/config.h>
|
||||
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <debug.h>
|
||||
|
||||
#include <nuttx/pgalloc.h>
|
||||
|
||||
#include <arch/irq.h>
|
||||
|
||||
#include "cache.h"
|
||||
#include "mmu.h"
|
||||
#include "pginline.h"
|
||||
#include "addrenv.h"
|
||||
|
||||
#ifdef CONFIG_ARCH_ADDRENV
|
||||
|
||||
/****************************************************************************
|
||||
* Pre-processor Definitions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Data
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Private Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Public Functions
|
||||
****************************************************************************/
|
||||
|
||||
/****************************************************************************
|
||||
* Name: set_l2_entry
|
||||
*
|
||||
* Description:
|
||||
* Set the L2 table entry as part of the initialization of the L2 Page
|
||||
* table.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void set_l2_entry(FAR uint32_t *l2table, uintptr_t paddr, uintptr_t vaddr,
|
||||
uint32_t mmuflags)
|
||||
{
|
||||
uint32_t index;
|
||||
|
||||
/* The table divides a 1Mb address space up into 256 entries, each
|
||||
* corresponding to 4Kb of address space. The page table index is
|
||||
* related to the offset from the beginning of 1Mb region.
|
||||
*/
|
||||
|
||||
index = (vaddr & 0x000ff000) >> 12;
|
||||
|
||||
/* Save the table entry */
|
||||
|
||||
l2table[index] = (paddr | mmuflags);
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: arm_addrenv_create_region
|
||||
*
|
||||
* Description:
|
||||
* Create one memory region.
|
||||
*
|
||||
* Returned Value:
|
||||
* On success, the number of pages allocated is returned. Otherwise, a
|
||||
* negated errno value is returned.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
int arm_addrenv_create_region(FAR uintptr_t **list, unsigned int listlen,
|
||||
uintptr_t vaddr, size_t regionsize,
|
||||
uint32_t mmuflags)
|
||||
{
|
||||
irqstate_t flags;
|
||||
uintptr_t paddr;
|
||||
FAR uint32_t *l2table;
|
||||
#ifndef CONFIG_ARCH_PGPOOL_MAPPING
|
||||
uint32_t l1save;
|
||||
#endif
|
||||
size_t nmapped;
|
||||
unsigned int npages;
|
||||
unsigned int i;
|
||||
unsigned int j;
|
||||
|
||||
bvdbg("listlen=%d vaddr=%08lx regionsize=%ld, mmuflags=%08x\n",
|
||||
listlen, (unsigned long)vaddr, (unsigned long)regionsize,
|
||||
(unsigned int)mmuflags);
|
||||
|
||||
/* Verify that we are configured with enough virtual address space to
|
||||
* support this memory region.
|
||||
*
|
||||
* npages pages correspondes to (npages << MM_PGSHIFT) bytes
|
||||
* listlen sections corresponds to (listlen << 20) bytes
|
||||
*/
|
||||
|
||||
npages = MM_NPAGES(regionsize);
|
||||
if (npages > (listlen << (20 - MM_PGSHIFT)))
|
||||
{
|
||||
bdbg("ERROR: npages=%u listlen=%u\n", npages, listlen);
|
||||
return -E2BIG;
|
||||
}
|
||||
|
||||
/* Back the allocation up with physical pages and set up the level mapping
|
||||
* (which of course does nothing until the L2 page table is hooked into
|
||||
* the L1 page table).
|
||||
*/
|
||||
|
||||
nmapped = 0;
|
||||
for (i = 0; i < npages; i += ENTRIES_PER_L2TABLE)
|
||||
{
|
||||
/* Allocate one physical page for the L2 page table */
|
||||
|
||||
paddr = mm_pgalloc(1);
|
||||
if (!paddr)
|
||||
{
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
DEBUGASSERT(MM_ISALIGNED(paddr));
|
||||
list[i] = (FAR uintptr_t *)paddr;
|
||||
|
||||
flags = irqsave();
|
||||
|
||||
#ifdef CONFIG_ARCH_PGPOOL_MAPPING
|
||||
/* Get the virtual address corresponding to the physical page address */
|
||||
|
||||
l2table = (FAR uint32_t *)arm_pgvaddr(paddr);
|
||||
#else
|
||||
/* Temporarily map the page into the virtual address space */
|
||||
|
||||
l1save = mmu_l1_getentry(ARCH_SCRATCH_VBASE);
|
||||
mmu_l1_setentry(paddr & ~SECTION_MASK, ARCH_SCRATCH_VBASE, MMU_MEMFLAGS);
|
||||
l2table = (FAR uint32_t *)(ARCH_SCRATCH_VBASE | (paddr & SECTION_MASK));
|
||||
#endif
|
||||
|
||||
/* Initialize the page table */
|
||||
|
||||
memset(l2table, 0, ENTRIES_PER_L2TABLE * sizeof(uint32_t));
|
||||
|
||||
/* Back up L2 entries with physical memory */
|
||||
|
||||
for (j = 0; j < ENTRIES_PER_L2TABLE && nmapped < regionsize; j++)
|
||||
{
|
||||
/* Allocate one physical page for region data */
|
||||
|
||||
paddr = mm_pgalloc(1);
|
||||
if (!paddr)
|
||||
{
|
||||
#ifndef CONFIG_ARCH_PGPOOL_MAPPING
|
||||
mmu_l1_restore(ARCH_SCRATCH_VBASE, l1save);
|
||||
#endif
|
||||
irqrestore(flags);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* Map the .text region virtual address to this physical address */
|
||||
|
||||
set_l2_entry(l2table, paddr, vaddr, mmuflags);
|
||||
nmapped += MM_PGSIZE;
|
||||
vaddr += MM_PGSIZE;
|
||||
}
|
||||
|
||||
/* Make sure that the initialized L2 table is flushed to physical
|
||||
* memory.
|
||||
*/
|
||||
|
||||
arch_flush_dcache((uintptr_t)l2table,
|
||||
(uintptr_t)l2table +
|
||||
ENTRIES_PER_L2TABLE * sizeof(uint32_t));
|
||||
|
||||
#ifndef CONFIG_ARCH_PGPOOL_MAPPING
|
||||
/* Restore the scratch section L1 page table entry */
|
||||
|
||||
mmu_l1_restore(ARCH_SCRATCH_VBASE, l1save);
|
||||
#endif
|
||||
irqrestore(flags);
|
||||
}
|
||||
|
||||
return npages;
|
||||
}
|
||||
|
||||
/****************************************************************************
|
||||
* Name: arm_addrenv_destroy_region
|
||||
*
|
||||
* Description:
|
||||
* Destroy one memory region.
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
void arm_addrenv_destroy_region(FAR uintptr_t **list, unsigned int listlen,
|
||||
uintptr_t vaddr)
|
||||
{
|
||||
irqstate_t flags;
|
||||
uintptr_t paddr;
|
||||
FAR uint32_t *l2table;
|
||||
#ifndef CONFIG_ARCH_PGPOOL_MAPPING
|
||||
uint32_t l1save;
|
||||
#endif
|
||||
int i;
|
||||
int j;
|
||||
|
||||
bvdbg("listlen=%d vaddr=%08lx\n", listlen, (unsigned long)vaddr);
|
||||
|
||||
for (i = 0; i < listlen; vaddr += SECTION_SIZE, list++, i++)
|
||||
{
|
||||
/* Unhook the L2 page table from the L1 page table */
|
||||
|
||||
mmu_l1_clrentry(vaddr);
|
||||
|
||||
/* Has this page table been allocated? */
|
||||
|
||||
paddr = (uintptr_t)list[i];
|
||||
if (paddr != 0)
|
||||
{
|
||||
flags = irqsave();
|
||||
|
||||
#ifdef CONFIG_ARCH_PGPOOL_MAPPING
|
||||
/* Get the virtual address corresponding to the physical page address */
|
||||
|
||||
l2table = (FAR uint32_t *)arm_pgvaddr(paddr);
|
||||
#else
|
||||
/* Temporarily map the page into the virtual address space */
|
||||
|
||||
l1save = mmu_l1_getentry(ARCH_SCRATCH_VBASE);
|
||||
mmu_l1_setentry(paddr & ~SECTION_MASK, ARCH_SCRATCH_VBASE, MMU_MEMFLAGS);
|
||||
l2table = (FAR uint32_t *)(ARCH_SCRATCH_VBASE | (paddr & SECTION_MASK));
|
||||
#endif
|
||||
|
||||
/* Return the allocated pages to the page allocator */
|
||||
|
||||
for (j = 0; j < ENTRIES_PER_L2TABLE; j++)
|
||||
{
|
||||
paddr = *l2table++;
|
||||
if (paddr != 0)
|
||||
{
|
||||
paddr &= PTE_SMALL_PADDR_MASK;
|
||||
mm_pgfree(paddr, 1);
|
||||
}
|
||||
}
|
||||
|
||||
#ifndef CONFIG_ARCH_PGPOOL_MAPPING
|
||||
/* Restore the scratch section L1 page table entry */
|
||||
|
||||
mmu_l1_restore(ARCH_SCRATCH_VBASE, l1save);
|
||||
#endif
|
||||
irqrestore(flags);
|
||||
|
||||
/* And free the L2 page table itself */
|
||||
|
||||
mm_pgfree((uintptr_t)list[i], 1);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* CONFIG_ARCH_ADDRENV */
|
||||
@@ -93,7 +93,7 @@ CMN_CSRCS += up_task_start.c up_pthread_start.c up_signal_dispatch.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_ARCH_ADDRENV),y)
|
||||
CMN_CSRCS += arm_addrenv.c arm_pgalloc.c
|
||||
CMN_CSRCS += arm_addrenv.c arm_addrenv_utils.c arm_pgalloc.c
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_ELF),y)
|
||||
|
||||
@@ -274,6 +274,27 @@ struct addrenv_reserve_s
|
||||
* up_addrenv_detach - Release the thread's reference to an address
|
||||
* environment when a task/thread exits.
|
||||
*
|
||||
* CONFIG_ARCH_STACK_DYNAMIC=y indicates that the user process stack resides
|
||||
* in its own address space. This options is also *required* if
|
||||
* CONFIG_BUILD_KERNEL and CONFIG_LIBC_EXECFUNCS are selected. Why?
|
||||
* Because the caller's stack must be preserved in its own address space
|
||||
* when we instantiate the environment of the new process in order to
|
||||
* initialize it.
|
||||
*
|
||||
* NOTE: The naming of the CONFIG_ARCH_STACK_DYNAMIC selection implies that
|
||||
* dynamic stack allocation is supported. Certainly this option must be set
|
||||
* if dynamic stack allocation is supported by a platform. But the more
|
||||
* general meaning of this configuration environment is simply that the
|
||||
* stack has its own address space.
|
||||
*
|
||||
* If CONFIG_ARCH_STACK_DYNAMIC=y is selected then the platform specific
|
||||
* code must export these additional interfaces:
|
||||
*
|
||||
* up_addrenv_stackalloc - Create a stack address environment
|
||||
* up_addrenv_stackfree - Destroy a stack address environment.
|
||||
* up_addrenv_vstack - Returns the virtual base address of the stack
|
||||
* up_addrenv_stackselect - Instantiate a stack address environment
|
||||
*
|
||||
****************************************************************************/
|
||||
|
||||
/* Prototyped in include/nuttx/arch.h as part of the OS/platform interface */
|
||||
|
||||
@@ -747,6 +747,27 @@ uintptr_t pgalloc(uintptr_t brkaddr, unsigned int npages);
|
||||
* up_addrenv_detach - Release the threads reference to an address
|
||||
* environment when a task/thread exits.
|
||||
*
|
||||
* CONFIG_ARCH_STACK_DYNAMIC=y indicates that the user process stack resides
|
||||
* in its own address space. This options is also *required* if
|
||||
* CONFIG_BUILD_KERNEL and CONFIG_LIBC_EXECFUNCS are selected. Why?
|
||||
* Because the caller's stack must be preserved in its own address space
|
||||
* when we instantiate the environment of the new process in order to
|
||||
* initialize it.
|
||||
*
|
||||
* NOTE: The naming of the CONFIG_ARCH_STACK_DYNAMIC selection implies that
|
||||
* dynamic stack allocation is supported. Certainly this option must be set
|
||||
* if dynamic stack allocation is supported by a platform. But the more
|
||||
* general meaning of this configuration environment is simply that the
|
||||
* stack has its own address space.
|
||||
*
|
||||
* If CONFIG_ARCH_STACK_DYNAMIC=y is selected then the platform specific
|
||||
* code must export these additional interfaces:
|
||||
*
|
||||
* up_addrenv_stackalloc - Create a stack address environment
|
||||
* up_addrenv_stackfree - Destroy a stack address environment.
|
||||
* up_addrenv_vstack - Returns the virtual base address of the stack
|
||||
* up_addrenv_stackselect - Instantiate a stack address environment
|
||||
*
|
||||
****************************************************************************/
|
||||
/****************************************************************************
|
||||
* Name: up_addrenv_create
|
||||
|
||||
Reference in New Issue
Block a user