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Cortex-A: Fix start-up cache invalidation logi

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This commit is contained in:
Gregory Nutt
2013-12-18 09:01:43 -06:00
parent d67eeb1f8a
commit e23dcc6384
3 changed files with 35 additions and 17 deletions
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ChangeLog
+2
View File
@@ -6238,4 +6238,6 @@
* Makefile.unix: Now has supports qconfig and gconfig targets.
These tools will use the Qt and GTK versions of the kconfig-
frontends configuration tools (if you built them) (2013-12-16)
* arch/arm/src/armv7-a/arm_head.h: Fixe some errors in the cache
invalidation logic (only seem to matter for Cortex-A8) (21-3-12-19).
arch/arm/src/armv7-a/arm_head.S
+17 -9
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@@ -283,7 +283,7 @@ __start:
add r2, r5, r2, lsr #18 /* R2=Offset page table address */
/* No loop until each page table entry has been written for the .text
* regtion.
* region.
*/
.Lpgtextloop:
@@ -295,7 +295,7 @@ __start:
#ifdef CONFIG_BOOT_RUNFROMFLASH
/* If we are executing from FLASH, then we will need additional mappings for
* the primay RAM region that holds the .data, .bss, stack, and heap memory.
* the primary RAM region that holds the .data, .bss, stack, and heap memory.
*
* Here we expect to have:
* r5 = Address of the base of the L1 table
@@ -357,8 +357,11 @@ __start:
*/
mov r0, #0
mcr CP15_ICIALLUIS(r0) /* Invalidate entire instruction cache Inner Shareable */
mcr CP15_TLBIALLIS(r0) /* Invalidate entire Unified TLB Inner Shareable */
mcr CP15_TLBIALL(r0,c7) /* Invalidate the entire unified TLB */
mcr CP15_TLBIALL(r0,c6)
mcr CP15_TLBIALL(r0,c5)
mcr CP15_BPIALL(r0) /* Invalidate entire branch prediction array */
mcr CP15_ICIALLU(r0) /* Invalidate I-cache */
/* Load the page table address.
*
@@ -366,7 +369,7 @@ __start:
* - Here we assume that the page table address is aligned to at least
* least a 16KB boundary (bits 0-13 are zero). No masking is provided
* to protect against an unaligned page table address.
* - The Cortex-A5 has two page table address registers, TTBR0 and 1.
* - The ARMv7-A has two page table address registers, TTBR0 and 1.
* Only TTBR0 is used in this implementation but both are initialized.
*
* Here we expect to have:
@@ -374,8 +377,9 @@ __start:
* r5 = Address of the base of the L1 table
*/
mcr CP15_TTBR0(r5)
mcr CP15_TTBR1(r5)
orr r1, r5, #0x48
mcr CP15_TTBR0(r1)
mcr CP15_TTBR1(r1)
/* Set the TTB control register (TTBCR) to indicate that we are using
* TTBR0. r0 still holds the value of zero.
@@ -435,7 +439,10 @@ __start:
* SCTLR_Z Bit 11: Program flow prediction control always enabled on A5
*/
orr r0, r0, #(SCTLR_M /* | SCTLR_Z */)
orr r0, r0, #(SCTLR_M)
#ifndef CONFIG_ARCH_CORTEXA5
orr r0, r0, #(SCTLR_Z)
#endif
/* Position vectors to 0xffff0000 if so configured.
*
@@ -452,7 +459,8 @@ __start:
* replacement strategy.
*/
#ifndef CPU_CACHE_ROUND_ROBIN
#if defined(CPU_CACHE_ROUND_ROBIN) && !defined(CONFIG_ARCH_CORTEXA5)
orr r0, r0, #(SCTLR_RR)
#endif
/* Dcache enable
arch/arm/src/armv7-a/arm_pghead.S
+14 -6
View File
@@ -343,8 +343,11 @@ __start:
*/
mov r0, #0
mcr CP15_ICIALLUIS(r0) /* Invalidate entire instruction cache Inner Shareable */
mcr CP15_TLBIALLIS(r0) /* Invalidate entire Unified TLB Inner Shareable */
mcr CP15_TLBIALL(r0,c7) /* Invalidate the entire unified TLB */
mcr CP15_TLBIALL(r0,c6)
mcr CP15_TLBIALL(r0,c5)
mcr CP15_BPIALL(r0) /* Invalidate entire branch prediction array */
mcr CP15_ICIALLU(r0) /* Invalidate I-cache */
/* Load the page table address.
*
@@ -360,8 +363,9 @@ __start:
* r4 = Address of the base of the L1 table
*/
mcr CP15_TTBR0(r4)
mcr CP15_TTBR1(r4)
orr r1, r4, #0x48
mcr CP15_TTBR0(r1)
mcr CP15_TTBR1(r1)
/* Set the TTB control register (TTBCR) to indicate that we are using
* TTBR0. r0 still holds the value of zero.
@@ -421,7 +425,10 @@ __start:
* SCTLR_Z Bit 11: Program flow prediction control always enabled on A5
*/
orr r0, r0, #(SCTLR_M /* | SCTLR_Z */)
orr r0, r0, #(SCTLR_M)
#ifndef CONFIG_ARCH_CORTEXA5
orr r0, r0, #(SCTLR_Z)
#endif
/* Position vectors to 0xffff0000 if so configured.
*
@@ -438,7 +445,8 @@ __start:
* replacement strategy.
*/
#ifndef CPU_CACHE_ROUND_ROBIN
#if defined(CPU_CACHE_ROUND_ROBIN) && !defined(CONFIG_ARCH_CORTEXA5)
orr r0, r0, #(SCTLR_RR)
#endif
/* Dcache enable