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bernard
2013-09-20 21:20:51 +08:00
parent 0bf7ed76cf
commit 9d09cd9f23
27 changed files with 3160 additions and 0 deletions
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libcpu/arm/am335x/SConscript
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Import('rtconfig')
from building import *
cwd = GetCurrentDir()
src = Glob('*.c')
CPPPATH = [cwd]
if rtconfig.PLATFORM == 'iar':
src += Glob('*_iar.S')
elif rtconfig.PLATFORM == 'gcc':
src += Glob('*_gcc.S')
elif rtconfig.PLATFORM == 'armcc':
src += Glob('*_rvds.S')
group = DefineGroup('AM1808', src, depend = [''], CPPPATH = CPPPATH)
Return('group')
libcpu/arm/am335x/am33xx.h
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#ifndef __AM33XX_H__
#define __AM33XX_H__
#define REG32(x) (*((volatile unsigned int *)(x)))
#define REG16(x) (*((volatile unsigned short *)(x)))
/** Cache Line size in ARM Cortex-A8. */
#define AM33XX_CACHELINE_SIZE (64)
/** @brief Base address of AINTC memory mapped registers */
#define AM33XX_AINTC_REGS (0x48200000)
/** @brief Base addresses of control module registers */
#define AM33XX_CTLM_REGS (0x44e10000)
/** @brief Base addresses of USB memory mapped registers */
#define AM33XX_USB_0_BASE (0x47401400)
#define AM33XX_USB_1_BASE (0x47401C00)
/** @brief Base addresses of SPI memory mapped registers */
#define AM33XX_SPI_0_REGS (0x48030000)
#define AM33XX_SPI_1_REGS (0x481A0000)
/** @brief Base addresses of GPIO memory mapped registers */
#define AM33XX_GPIO_0_REGS (0x44E07000)
#define AM33XX_GPIO_1_REGS (0x4804C000)
#define AM33XX_GPIO_2_REGS (0x481AC000)
#define AM33XX_GPIO_3_REGS (0x481AE000)
/** @brief Base addresses of DMTIMER memory mapped registers */
#define AM33XX_DMTIMER_0_REGS (0x44E05000)
#define AM33XX_DMTIMER_1_REGS (0x44E31000)
#define AM33XX_DMTIMER_2_REGS (0x48040000)
#define AM33XX_DMTIMER_3_REGS (0x48042000)
#define AM33XX_DMTIMER_4_REGS (0x48044000)
#define AM33XX_DMTIMER_5_REGS (0x48046000)
#define AM33XX_DMTIMER_6_REGS (0x48048000)
#define AM33XX_DMTIMER_7_REGS (0x4804A000)
/** @brief Base address of MMC memory mapped registers */
#define AM33XX_MMCHS_0_REGS (0x48060000)
#define AM33XX_MMCHS_1_REGS (0x481D8000)
#define AM33XX_MMCHS_2_REGS (0x47810000)
/** @brief Base address of GPMC memory mapped registers */
#define AM33XX_GPMC_0_REGS (0x50000000)
/** @brief Base address of GPMC memory mapped registers */
#define AM33XX_ELM_0_REGS (0x48080000)
/** @brief Base address of I2C memory mapped registers */
#define AM33XX_I2C_0_REGS (0x44E0B000)
#define AM33XX_I2C_1_REGS (0x4802A000)
#define AM33XX_I2C_2_REGS (0x4819C000)
/** @brief Base address of WDT memory mapped registers */
#define AM33XX_WDT_0_REGS (0x44E33000)
#define AM33XX_WDT_1_REGS (0x44E35000)
/** @brief Base address of WDT memory mapped registers */
#define AM33XX_CPSW_SS_REGS (0x4A100000)
#define AM33XX_CPSW_MDIO_REGS (0x4A101000)
#define AM33XX_CPSW_WR_REGS (0x4A101200)
#define AM33XX_CPSW_CPDMA_REGS (0x4A100800)
#define AM33XX_CPSW_ALE_REGS (0x4A100D00)
#define AM33XX_CPSW_STAT_REGS (0x4A100900)
#define AM33XX_CPSW_PORT_0_REGS (0x4A100100)
#define AM33XX_CPSW_PORT_1_REGS (0x4A100200)
#define AM33XX_CPSW_SLIVER_1_REGS (0x4A100D80)
#define AM33XX_CPSW_PORT_2_REGS (0x4A100300)
#define AM33XX_CPSW_SLIVER_2_REGS (0x4A100DC0)
#define AM33XX_CPSW_CPPI_RAM_REGS (0x4A102000)
/** @brief Base address of McASP memory mapped registers */
#define AM33XX_MCASP_1_CTRL_REGS (0x4803C000)
#define AM33XX_MCASP_1_FIFO_REGS (AM33XX_MCASP_1_CTRL_REGS + 0x1000)
#define AM33XX_MCASP_1_DATA_REGS (0x46400000)
/** @brief Base address of EMIF memory mapped registers */
#define AM33XX_EMIF_0_REGS (0x4C000000)
/** @brief Base addresses of RTC memory mapped registers */
#define AM33XX_RTC_0_REGS (0x44E3E000)
#define CM_PER(base) ((base) + 0)
#define CM_PER_L4LS_CLKSTCTRL(base) (CM_PER(base) + 0)
#define CM_PER_UART1_CLKCTRL(base) (CM_PER(base) + 0x06C)
#define CM_WKUP(base) ((base) + 0x400)
#define CM_DPLL(base) ((base) + 0x500)
#define CM_MPU(base) ((base) + 0x600)
#define CM_DEVICE(base) ((base) + 0x700)
#define CM_RTC(base) ((base) + 0x800)
#define CM_GFX(base) ((base) + 0x900)
#define CM_CEFUSE(base) ((base) + 0xA00)
#define OCP_AM33XXKET_RAM(base) ((base) + 0xB00)
#define PRM_PER(base) ((base) + 0xC00)
#define PRM_PER_PWRSTST(base) (PRM_PER(base) + 0x008)
#define PRM_PER_PWRSTCTRL(base) (PRM_PER(base) + 0x00C)
#define PRM_WKUP(base) ((base) + 0xD00)
#define PRM_MPU(base) ((base) + 0xE00)
#define PRM_DEVICE(base) ((base) + 0xF00)
#define PRM_RTC(base) ((base) + 0x1000)
#define PRM_GFX(base) ((base) + 0x1100)
#define PRM_CEFUSE(base) ((base) + 0x1200)
/** @brief Base addresses of PRCM memory mapped registers */
#define AM33XX_PRCM_REGS (0x44E00000)
#define AM33XX_CM_PER_REGS CM_PER(AM33XX_PRCM_REGS)
#define AM33XX_CM_WKUP_REGS CM_WKUP(AM33XX_PRCM_REGS)
#define AM33XX_CM_DPLL_REGS CM_DPLL(AM33XX_PRCM_REGS)
#define AM33XX_CM_MPU_REGS CM_MPU(AM33XX_PRCM_REGS)
#define AM33XX_CM_DEVICE_REGS CM_DEVICE(AM33XX_PRCM_REGS)
#define AM33XX_CM_RTC_REGS CM_RTC(AM33XX_PRCM_REGS)
#define AM33XX_CM_GFX_REGS CM_GFX(AM33XX_PRCM_REGS)
#define AM33XX_CM_CEFUSE_REGS CM_CEFUSE(AM33XX_PRCM_REGS)
#define AM33XX_OCP_AM33XXKET_RAM_REGS OCP_AM33XXKET_RAM(AM33XX_PRCM_REGS)
#define AM33XX_PRM_PER_REGS PRM_PER(AM33XX_PRCM_REGS)
#define AM33XX_PRM_WKUP_REGS PRM_WKUP(AM33XX_PRCM_REGS)
#define AM33XX_PRM_MPU_REGS PRM_MPU(AM33XX_PRCM_REGS)
#define AM33XX_PRM_DEVICE_REGS PRM_DEVICE(AM33XX_PRCM_REGS)
#define AM33XX_PRM_RTC_REGS PRM_RTC(AM33XX_PRCM_REGS)
#define AM33XX_PRM_GFX_REGS PRM_GFX(AM33XX_PRCM_REGS)
#define AM33XX_PRM_CEFUSE_REGS PRM_CEFUSE(AM33XX_PRCM_REGS)
/** @brief Base address of control module memory mapped registers */
#define AM33XX_CONTROL_REGS (0x44E10000)
/** @brief Base address of Channel controller memory mapped registers */
#define AM33XX_EDMA30CC_0_REGS (0x49000000)
/** @brief Base address of DCAN module memory mapped registers */
#define AM33XX_DCAN_0_REGS (0x481CC000)
#define AM33XX_DCAN_1_REGS (0x481D0000)
/******************************************************************************\
* Parameterizable Configuration:- These are fed directly from the RTL
* parameters for the given AM33XX
\******************************************************************************/
#define TPCC_MUX(n) 0xF90 + ((n) * 4)
#define AM33XX_LCDC_0_REGS 0x4830E000
#define AM33XX_ADC_TSC_0_REGS 0x44E0D000
/** @brief Base addresses of PWMSS memory mapped registers. */
#define AM33XX_PWMSS0_REGS (0x48300000)
#define AM33XX_PWMSS1_REGS (0x48302000)
#define AM33XX_PWMSS2_REGS (0x48304000)
#define AM33XX_ECAP_REGS (0x00000100)
#define AM33XX_EQEP_REGS (0x00000180)
#define AM33XX_EPWM_REGS (0x00000200)
#define AM33XX_ECAP_0_REGS (AM33XX_PWMSS0_REGS + AM33XX_ECAP_REGS)
#define AM33XX_ECAP_1_REGS (AM33XX_PWMSS1_REGS + AM33XX_ECAP_REGS)
#define AM33XX_ECAP_2_REGS (AM33XX_PWMSS2_REGS + AM33XX_ECAP_REGS)
#define AM33XX_EQEP_0_REGS (AM33XX_PWMSS0_REGS + AM33XX_EQEP_REGS)
#define AM33XX_EQEP_1_REGS (AM33XX_PWMSS1_REGS + AM33XX_EQEP_REGS)
#define AM33XX_EQEP_2_REGS (AM33XX_PWMSS2_REGS + AM33XX_EQEP_REGS)
#define AM33XX_EPWM_0_REGS (AM33XX_PWMSS0_REGS + AM33XX_EPWM_REGS)
#define AM33XX_EPWM_1_REGS (AM33XX_PWMSS1_REGS + AM33XX_EPWM_REGS)
#define AM33XX_EPWM_2_REGS (AM33XX_PWMSS2_REGS + AM33XX_EPWM_REGS)
#define AM33XX_EPWM_MODULE_FREQ 100
/* PRCM registers */
#define CM_PER_L4LS_CLKSTCTRL_REG(base) REG32((base) + 0x0)
#define CM_PER_UART1_CLKCTRL_REG(base) REG32(CM_PER_UART1_CLKCTRL(base))
#define CM_PER_TIMER7_CLKCTRL(base) REG32((base) + 0x7C)
#define CM_PER_TIMER2_CLKCTRL(base) REG32((base) + 0x80)
#define PRM_PER_PWRSTST_REG(base) REG32(PRM_PER_PWRSTST(base))
#define PRM_PER_PWRSTCTRL_REG(base) REG32(PRM_PER_PWRSTCTRL(base))
#define CM_DPLL_CLKSEL_TIMER7_CLK(base) REG32(CM_DPLL(base) + 0x4)
#define CM_DPLL_CLKSEL_TIMER2_CLK(base) REG32(CM_DPLL(base) + 0x8)
/* timer registers */
#define DMTIMER_TIDR(base) REG32(base + 0x0)
#define DMTIMER_TIOCP_CFG(base) REG32(base + 0x10)
#define DMTIMER_IRQ_EOI(base) REG32(base + 0x20)
#define DMTIMER_IRQSTATUS_RAW(base) REG32(base + 0x24)
#define DMTIMER_IRQSTATUS(base) REG32(base + 0x28)
#define DMTIMER_IRQENABLE_SET(base) REG32(base + 0x2C)
#define DMTIMER_IRQENABLE_CLR(base) REG32(base + 0x30)
#define DMTIMER_IRQWAKEEN(base) REG32(base + 0x34)
#define DMTIMER_TCLR(base) REG32(base + 0x38)
#define DMTIMER_TCRR(base) REG32(base + 0x3C)
#define DMTIMER_TLDR(base) REG32(base + 0x40)
#define DMTIMER_TTGR(base) REG32(base + 0x44)
#define DMTIMER_TWPS(base) REG32(base + 0x48)
#define DMTIMER_TMAR(base) REG32(base + 0x4C)
#define DMTIMER_TCAR(base, n) REG32(base + 0x50 + (((n) - 1) * 8))
#define DMTIMER_TSICR(base) REG32(base + 0x54)
#define EMU_INT 0
#define COMMTX_INT 1
#define COMMRX_INT 2
#define BENCH_INT 3
#define ELM_IRQ_INT 4
#define NMI_INT 7
#define L3DEBUG_INT 9
#define L3APP_INT 10
#define PRCM_INT 11
#define EDMACOMP_INT 12
#define EDMAMPERR_INT 13
#define EDMAERR_INT 14
#define ADC_TSC_GEN_INT 16
#define USBSS_INT 17
#define USB_INT0 18
#define USB_INT1 19
#define PRU_ICSS_EVTOUT0_INT 20
#define PRU_ICSS_EVTOUT1_INT 21
#define PRU_ICSS_EVTOUT2_INT 22
#define PRU_ICSS_EVTOUT3_INT 23
#define PRU_ICSS_EVTOUT4_INT 24
#define PRU_ICSS_EVTOUT5_INT 25
#define PRU_ICSS_EVTOUT6_INT 26
#define PRU_ICSS_EVTOUT7_INT 27
#define MMCSD1_INT 28
#define MMCSD2_INT 29
#define I2C2_INT 30
#define ECAP0_INT 31
#define GPIO_INT2A 32
#define GPIO_INT2B 33
#define USBWAKEUP_INT 34
#define LCDC_INT 36
#define GFX_INT 37
#define EPWM2_INT 39
#define CPSW_RXTHR0_INT 40
#define CPSW_RX_INT0 41
#define CPSW_TX_INT0 42
#define CPSW_MISC0_INT 43
#define UART3_INT 44
#define UART4_INT 45
#define UART5_INT 46
#define ECAP1_INT 47
#define DCAN0_INT0 52
#define DCAN0_INT1 53
#define DCAN0_PARITY 54
#define DCAN1_INT0 55
#define DCAN1_INT1 56
#define DCAN1_PARITY 57
#define EPWM0_TZINT 58
#define EPWM1_TZINT 59
#define EPWM2_TZINT 60
#define ECAP2_INT 61
#define GPIO_INT3A 62
#define GPIO_INT3B 63
#define MMCSD0_INT 64
#define MCSPI0_INT 65
#define TINT0 66
#define TINT1_1MS 67
#define TINT2 68
#define TINT3 69
#define I2C0_INT 70
#define I2C1_INT 71
#define UART0_INT 72
#define UART1_INT 73
#define UART2_INT 74
#define RTC_INT 75
#define RTC_ALARM_INT 76
#define MB_INT0 77
#define M3_TXEV 78
#define EQEP0_INT 79
#define MACTX_INT0 80
#define MCARX_INT0 81
#define MCATX_INT1 82
#define MCARX_INT1 83
#define EPWM0_INT 86
#define EPWM1_INT 87
#define EQEP1_INT 88
#define EQEP2_INT 89
#define DMA_INTR_PIN2 90
#define WDT1_INT 91
#define TINT4 92
#define TINT5 93
#define TINT6 94
#define TINT7 95
#define GPIO_INT0A 96
#define GPIO_INT0B 97
#define GPIO_INT1A 98
#define GPIO_INT1B 99
#define GPMC_INT 100
#define DDRERR0 101
#define TCERR_INT0 112
#define TCERR_INT1 113
#define TCERR_INT2 114
#define ADC_TSC_PEN_INT 115
#define SMRFLX_MPU 120
#define SMRFLX_CORE 121
#define DMA_INTR_PIN0 123
#define DMA_INTR_PIN1 124
#define MCSPI1_INT 125
struct rt_hw_register
{
unsigned long r0;
unsigned long r1;
unsigned long r2;
unsigned long r3;
unsigned long r4;
unsigned long r5;
unsigned long r6;
unsigned long r7;
unsigned long r8;
unsigned long r9;
unsigned long r10;
unsigned long fp;
unsigned long ip;
unsigned long sp;
unsigned long lr;
unsigned long pc;
unsigned long cpsr;
unsigned long ORIG_r0;
};
#define USERMODE 0x10
#define FIQMODE 0x11
#define IRQMODE 0x12
#define SVCMODE 0x13
#define ABORTMODE 0x17
#define UNDEFMODE 0x1b
#define MODEMASK 0x1f
#define NOINT 0xc0
#endif
libcpu/arm/am335x/context_gcc.S
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/*
* File : context.S
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2013, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2013-07-05 Bernard the first version
*/
/*
* rt_base_t rt_hw_interrupt_disable();
*/
.globl rt_hw_interrupt_disable
rt_hw_interrupt_disable:
mrs r0, cpsr
cpsid if
bx lr
/*
* void rt_hw_interrupt_enable(rt_base_t level);
*/
.globl rt_hw_interrupt_enable
rt_hw_interrupt_enable:
msr cpsr_c, r0
bx lr
/*
* void rt_hw_context_switch(rt_uint32 from, rt_uint32 to);
* r0 --> from
* r1 --> to
*/
.globl rt_hw_context_switch
rt_hw_context_switch:
stmfd sp!, {lr} @ push pc (lr should be pushed in place of PC)
stmfd sp!, {r0-r12, lr} @ push lr & register file
mrs r4, cpsr
tst lr, #0x01
orrne r4, r4, #0x20 @ it's thumb code
stmfd sp!, {r4} @ push cpsr
str sp, [r0] @ store sp in preempted tasks TCB
ldr sp, [r1] @ get new task stack pointer
ldmfd sp!, {r4} @ pop new task cpsr to spsr
msr spsr_cxsf, r4
_do_switch:
ldmfd sp!, {r0-r12, lr, pc}^ @ pop new task r0-r12, lr & pc, copy spsr to cpsr
/*
* void rt_hw_context_switch_to(rt_uint32 to);
* r0 --> to
*/
.globl rt_hw_context_switch_to
rt_hw_context_switch_to:
ldr sp, [r0] @ get new task stack pointer
ldmfd sp!, {r4} @ pop new task spsr
msr spsr_cxsf, r4
bic r4, r4, #0x20 @ must be ARM mode
msr cpsr_cxsf, r4
ldmfd sp!, {r0-r12, lr, pc}^ @ pop new task r0-r12, lr & pc
/*
* void rt_hw_context_switch_interrupt(rt_uint32 from, rt_uint32 to);
*/
.globl rt_thread_switch_interrupt_flag
.globl rt_interrupt_from_thread
.globl rt_interrupt_to_thread
.globl rt_hw_context_switch_interrupt
rt_hw_context_switch_interrupt:
ldr r2, =rt_thread_switch_interrupt_flag
ldr r3, [r2]
cmp r3, #1
beq _reswitch
mov r3, #1 @ set rt_thread_switch_interrupt_flag to 1
str r3, [r2]
ldr r2, =rt_interrupt_from_thread @ set rt_interrupt_from_thread
str r0, [r2]
_reswitch:
ldr r2, =rt_interrupt_to_thread @ set rt_interrupt_to_thread
str r1, [r2]
bx lr
libcpu/arm/am335x/cp15_gcc.S
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/*
* File : cp15_gcc.S
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2013, RT-Thread Development Team
* http://www.rt-thread.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2013-07-05 Bernard the first version
*/
.globl rt_cpu_vector_set_base
rt_cpu_vector_set_base:
mcr p15, #0, r0, c12, c0, #0
dsb
bx lr
.globl rt_cpu_vector_get_base
rt_cpu_vector_get_base:
mrc p15, #0, r0, c12, c0, #0
bx lr
.globl rt_cpu_get_sctlr
rt_cpu_get_sctlr:
mrc p15, #0, r0, c1, c0, #0
bx lr
.globl rt_cpu_dcache_enable
rt_cpu_dcache_enable:
mrc p15, #0, r0, c1, c0, #0
orr r0, r0, #0x00000004
mcr p15, #0, r0, c1, c0, #0
bx lr
.globl rt_cpu_icache_enable
rt_cpu_icache_enable:
mrc p15, #0, r0, c1, c0, #0
orr r0, r0, #0x00001000
mcr p15, #0, r0, c1, c0, #0
bx lr
_FLD_MAX_WAY:
.word 0x3ff
_FLD_MAX_IDX:
.word 0x7ff
.globl rt_cpu_dcache_clean_flush
rt_cpu_dcache_clean_flush:
push {r4-r11}
dmb
mrc p15, #1, r0, c0, c0, #1 @ read clid register
ands r3, r0, #0x7000000 @ get level of coherency
mov r3, r3, lsr #23
beq finished
mov r10, #0
loop1:
add r2, r10, r10, lsr #1
mov r1, r0, lsr r2
and r1, r1, #7
cmp r1, #2
blt skip
mcr p15, #2, r10, c0, c0, #0
isb
mrc p15, #1, r1, c0, c0, #0
and r2, r1, #7
add r2, r2, #4
ldr r4, _FLD_MAX_WAY
ands r4, r4, r1, lsr #3
clz r5, r4
ldr r7, _FLD_MAX_IDX
ands r7, r7, r1, lsr #13
loop2:
mov r9, r4
loop3:
orr r11, r10, r9, lsl r5
orr r11, r11, r7, lsl r2
mcr p15, #0, r11, c7, c14, #2
subs r9, r9, #1
bge loop3
subs r7, r7, #1
bge loop2
skip:
add r10, r10, #2
cmp r3, r10
bgt loop1
finished:
dsb
isb
pop {r4-r11}
bx lr
.globl rt_cpu_dcache_disable
rt_cpu_dcache_disable:
push {r4-r11, lr}
mrc p15, #0, r0, c1, c0, #0
bic r0, r0, #0x00000004
mcr p15, #0, r0, c1, c0, #0
bl rt_cpu_dcache_clean_flush
pop {r4-r11, lr}
bx lr
.globl rt_cpu_icache_disable
rt_cpu_icache_disable:
mrc p15, #0, r0, c1, c0, #0
bic r0, r0, #0x00001000
mcr p15, #0, r0, c1, c0, #0
bx lr
.globl rt_cpu_mmu_disable
rt_cpu_mmu_disable:
mcr p15, #0, r0, c8, c7, #0 @ invalidate tlb
mrc p15, #0, r0, c1, c0, #0
bic r0, r0, #1
mcr p15, #0, r0, c1, c0, #0 @ clear mmu bit
dsb
bx lr
.globl rt_cpu_mmu_enable
rt_cpu_mmu_enable:
mrc p15, #0, r0, c1, c0, #0
orr r0, r0, #0x001
mcr p15, #0, r0, c1, c0, #0 @ set mmu enable bit
dsb
bx lr
.globl rt_cpu_tlb_set
rt_cpu_tlb_set:
mcr p15, #0, r0, c2, c0, #0
dmb
bx lr
libcpu/arm/am335x/cpu.c
+165
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/*
* File : cpu.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-09-15 Bernard first version
*/
#include <rthw.h>
#include <rtthread.h>
#include "am33xx.h"
/**
* @addtogroup AM33xx
*/
/*@{*/
#define ICACHE_MASK (rt_uint32_t)(1 << 12)
#define DCACHE_MASK (rt_uint32_t)(1 << 2)
#if defined(__CC_ARM)
rt_inline rt_uint32_t cp15_rd(void)
{
rt_uint32_t i;
__asm
{
mrc p15, 0, i, c1, c0, 0
}
return i;
}
rt_inline void cache_enable(rt_uint32_t bit)
{
rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
orr value, value, bit
mcr p15, 0, value, c1, c0, 0
}
}
rt_inline void cache_disable(rt_uint32_t bit)
{
rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
bic value, value, bit
mcr p15, 0, value, c1, c0, 0
}
}
#elif defined(__GNUC__)
rt_inline rt_uint32_t cp15_rd(void)
{
rt_uint32_t i;
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
return i;
}
rt_inline void cache_enable(rt_uint32_t bit)
{
__asm__ __volatile__( \
"mrc p15,0,r0,c1,c0,0\n\t" \
"orr r0,r0,%0\n\t" \
"mcr p15,0,r0,c1,c0,0" \
: \
:"r" (bit) \
:"memory");
}
rt_inline void cache_disable(rt_uint32_t bit)
{
__asm__ __volatile__( \
"mrc p15,0,r0,c1,c0,0\n\t" \
"bic r0,r0,%0\n\t" \
"mcr p15,0,r0,c1,c0,0" \
: \
:"r" (bit) \
:"memory");
}
#endif
/**
* enable I-Cache
*
*/
void rt_hw_cpu_icache_enable()
{
cache_enable(ICACHE_MASK);
}
/**
* disable I-Cache
*
*/
void rt_hw_cpu_icache_disable()
{
cache_disable(ICACHE_MASK);
}
/**
* return the status of I-Cache
*
*/
rt_base_t rt_hw_cpu_icache_status()
{
return (cp15_rd() & ICACHE_MASK);
}
/**
* enable D-Cache
*
*/
void rt_hw_cpu_dcache_enable()
{
cache_enable(DCACHE_MASK);
}
/**
* disable D-Cache
*
*/
void rt_hw_cpu_dcache_disable()
{
cache_disable(DCACHE_MASK);
}
/**
* return the status of D-Cache
*
*/
rt_base_t rt_hw_cpu_dcache_status()
{
return (cp15_rd() & DCACHE_MASK);
}
/**
* shutdown CPU
*
*/
void rt_hw_cpu_shutdown()
{
rt_uint32_t level;
rt_kprintf("shutdown...\n");
level = rt_hw_interrupt_disable();
while (level)
{
RT_ASSERT(0);
}
}
/*@}*/
libcpu/arm/am335x/interrupt.c
+205
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/*
* File : interrupt.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2011, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2013-07-06 Bernard first version
*/
#include <rthw.h>
#include <rtthread.h>
#include "am33xx.h"
#include "interrupt.h"
#define AINTC_BASE AM33XX_AINTC_REGS
#define MAX_HANDLERS 128
extern volatile rt_uint8_t rt_interrupt_nest;
/* exception and interrupt handler table */
struct rt_irq_desc isr_table[MAX_HANDLERS];
rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
rt_uint32_t rt_thread_switch_interrupt_flag;
/**
* @addtogroup AM33xx
*/
/*@{*/
void rt_dump_aintc(void)
{
int k;
rt_kprintf("active irq %d", INTC_SIR_IRQ(AINTC_BASE));
rt_kprintf("\n--- hw mask ---\n");
for (k = 0; k < 4; k++)
{
rt_kprintf("0x%08x, ", INTC_MIR(AINTC_BASE, k));
}
rt_kprintf("\n--- hw itr ---\n");
for (k = 0; k < 4; k++)
{
rt_kprintf("0x%08x, ", INTC_ITR(AINTC_BASE, k));
}
rt_kprintf("\n");
}
const unsigned int AM335X_VECTOR_BASE = 0x4030FC00;
extern void rt_cpu_vector_set_base(unsigned int addr);
extern int system_vectors;
static void rt_hw_vector_init(void)
{
unsigned int *dest = (unsigned int *)AM335X_VECTOR_BASE;
unsigned int *src = (unsigned int *)&system_vectors;
rt_memcpy(dest, src, 16 * 4);
rt_cpu_vector_set_base(AM335X_VECTOR_BASE);
}
/**
* This function will initialize hardware interrupt
*/
void rt_hw_interrupt_init(void)
{
/* initialize vector table */
rt_hw_vector_init();
/* init exceptions table */
rt_memset(isr_table, 0x00, sizeof(isr_table));
/* init interrupt nest, and context in thread sp */
rt_interrupt_nest = 0;
rt_interrupt_from_thread = 0;
rt_interrupt_to_thread = 0;
rt_thread_switch_interrupt_flag = 0;
}
/**
* This function will mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_mask(int vector)
{
INTC_MIR_SET(AINTC_BASE, vector >> 0x05) = 0x1 << (vector & 0x1f);
}
/**
* This function will un-mask a interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_umask(int vector)
{
INTC_MIR_CLEAR(AINTC_BASE, vector >> 0x05) = 0x1 << (vector & 0x1f);
}
/**
* This function will control the interrupt attribute.
* @param vector the interrupt number
*/
void rt_hw_interrupt_control(int vector, int priority, int route)
{
int fiq;
if (route == 0)
fiq = 0;
else
fiq = 1;
INTC_ILR(AINTC_BASE, vector) = ((priority << 0x02) & 0x1FC) | fiq ;
}
int rt_hw_interrupt_get_active(int fiq_irq)
{
int ir;
if (fiq_irq == INT_FIQ)
{
ir = INTC_SIR_FIQ(AINTC_BASE) & 0x7f;
}
else
{
ir = INTC_SIR_IRQ(AINTC_BASE) & 0x7f;
}
return ir;
}
void rt_hw_interrupt_ack(int fiq_irq)
{
if (fiq_irq == INT_FIQ)
{
/* new FIQ generation */
INTC_CONTROL(AINTC_BASE) |= 0x02;
}
else
{
/* new IRQ generation */
INTC_CONTROL(AINTC_BASE) |= 0x01;
}
}
/**
* This function will install a interrupt service routine to a interrupt.
* @param vector the interrupt number
* @param new_handler the interrupt service routine to be installed
* @param old_handler the old interrupt service routine
*/
rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler,
void *param, char *name)
{
rt_isr_handler_t old_handler = RT_NULL;
if(vector < MAX_HANDLERS)
{
old_handler = isr_table[vector].handler;
if (handler != RT_NULL)
{
#ifdef RT_USING_INTERRUPT_INFO
rt_strncpy(isr_table[vector].name, name, RT_NAME_MAX);
#endif /* RT_USING_INTERRUPT_INFO */
isr_table[vector].handler = handler;
isr_table[vector].param = param;
}
}
return old_handler;
}
/**
* This function will trigger an interrupt.
* @param vector the interrupt number
*/
void rt_hw_interrupt_trigger(int vector)
{
INTC_ISR_SET(AINTC_BASE, vector>>5) = 1 << (vector & 0x1f);
}
void rt_hw_interrupt_clear(int vector)
{
INTC_ISR_CLEAR(AINTC_BASE, vector>>5) = 1 << (vector & 0x1f);
}
void rt_dump_isr_table(void)
{
int idx;
for(idx = 0; idx < MAX_HANDLERS; idx++)
{
#ifdef RT_USING_INTERRUPT_INFO
rt_kprintf("nr:%4d, name: %*.s, handler: 0x%p, param: 0x%08x\r\n",
idx, RT_NAME_MAX, isr_table[idx].name,
isr_table[idx].handler, isr_table[idx].param);
#else
rt_kprintf("nr:%4d, handler: 0x%p, param: 0x%08x\r\n",
idx, isr_table[idx].handler, isr_table[idx].param);
#endif
}
}
/*@}*/
libcpu/arm/am335x/interrupt.h
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/*
* File : interrupt.h
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2011, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2013-07-06 Bernard first version
*/
#ifndef __INTERRUPT_H__
#define __INTERRUPT_H__
#define INT_IRQ 0x00
#define INT_FIQ 0x01
#define INTC_REVISION(hw_base) REG32((hw_base) + 0x0)
#define INTC_SYSCONFIG(hw_base) REG32((hw_base) + 0x10)
#define INTC_SYSSTATUS(hw_base) REG32((hw_base) + 0x14)
#define INTC_SIR_IRQ(hw_base) REG32((hw_base) + 0x40)
#define INTC_SIR_FIQ(hw_base) REG32((hw_base) + 0x44)
#define INTC_CONTROL(hw_base) REG32((hw_base) + 0x48)
#define INTC_PROTECTION(hw_base) REG32((hw_base) + 0x4c)
#define INTC_IDLE(hw_base) REG32((hw_base) + 0x50)
#define INTC_IRQ_PRIORITY(hw_base) REG32((hw_base) + 0x60)
#define INTC_FIQ_PRIORITY(hw_base) REG32((hw_base) + 0x64)
#define INTC_THRESHOLD(hw_base) REG32((hw_base) + 0x68)
#define INTC_SICR(hw_base) REG32((hw_base) + 0x6c)
#define INTC_SCR(hw_base, n) REG32((hw_base) + 0x70 + ((n) * 0x04))
#define INTC_ITR(hw_base, n) REG32((hw_base) + 0x80 + ((n) * 0x20))
#define INTC_MIR(hw_base, n) REG32((hw_base) + 0x84 + ((n) * 0x20))
#define INTC_MIR_CLEAR(hw_base, n) REG32((hw_base) + 0x88 + ((n) * 0x20))
#define INTC_MIR_SET(hw_base, n) REG32((hw_base) + 0x8c + ((n) * 0x20))
#define INTC_ISR_SET(hw_base, n) REG32((hw_base) + 0x90 + ((n) * 0x20))
#define INTC_ISR_CLEAR(hw_base, n) REG32((hw_base) + 0x94 + ((n) * 0x20))
#define INTC_PENDING_IRQ(hw_base, n) REG32((hw_base) + 0x98 + ((n) * 0x20))
#define INTC_PENDING_FIQ(hw_base, n) REG32((hw_base) + 0x9c + ((n) * 0x20))
#define INTC_ILR(hw_base, n) REG32((hw_base) + 0x100 + ((n) * 0x04))
void rt_hw_interrupt_control(int vector, int priority, int route);
int rt_hw_interrupt_get_active(int fiq_irq);
void rt_hw_interrupt_ack(int fiq_irq);
void rt_hw_interrupt_trigger(int vector);
void rt_hw_interrupt_clear(int vector);
#endif
libcpu/arm/am335x/mmu.c
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/*
* File : mmu.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2012-01-10 bernard porting to AM1808
*/
#include <rtthread.h>
#include "am33xx.h"
#define DESC_SEC (0x2|(1<<4))
#define CB (3<<2) //cache_on, write_back
#define CNB (2<<2) //cache_on, write_through
#define NCB (1<<2) //cache_off,WR_BUF on
#define NCNB (0<<2) //cache_off,WR_BUF off
#define AP_RW (3<<10) //supervisor=RW, user=RW
#define AP_RO (2<<10) //supervisor=RW, user=RO
#define DOMAIN_FAULT (0x0)
#define DOMAIN_CHK (0x1)
#define DOMAIN_NOTCHK (0x3)
#define DOMAIN0 (0x0<<5)
#define DOMAIN1 (0x1<<5)
#define DOMAIN0_ATTR (DOMAIN_CHK<<0)
#define DOMAIN1_ATTR (DOMAIN_FAULT<<2)
#define RW_CB (AP_RW|DOMAIN0|CB|DESC_SEC) /* Read/Write, cache, write back */
#define RW_CNB (AP_RW|DOMAIN0|CNB|DESC_SEC) /* Read/Write, cache, write through */
#define RW_NCNB (AP_RW|DOMAIN0|NCNB|DESC_SEC) /* Read/Write without cache and write buffer */
#define RW_FAULT (AP_RW|DOMAIN1|NCNB|DESC_SEC) /* Read/Write without cache and write buffer */
#ifdef __CC_ARM
void mmu_setttbase(rt_uint32_t i)
{
register rt_uint32_t value;
/* Invalidates all TLBs.Domain access is selected as
* client by configuring domain access register,
* in that case access controlled by permission value
* set by page table entry
*/
value = 0;
__asm
{
mcr p15, 0, value, c8, c7, 0
}
value = 0x55555555;
__asm
{
mcr p15, 0, value, c3, c0, 0
mcr p15, 0, i, c2, c0, 0
}
}
void mmu_set_domain(rt_uint32_t i)
{
__asm
{
mcr p15,0, i, c3, c0, 0
}
}
void mmu_enable()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
orr value, value, #0x01
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_disable()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
bic value, value, #0x01
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_enable_icache()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
orr value, value, #0x1000
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_enable_dcache()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
orr value, value, #0x04
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_disable_icache()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
bic value, value, #0x1000
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_disable_dcache()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
bic value, value, #0x04
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_enable_alignfault()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
orr value, value, #0x02
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_disable_alignfault()
{
register rt_uint32_t value;
__asm
{
mrc p15, 0, value, c1, c0, 0
bic value, value, #0x02
mcr p15, 0, value, c1, c0, 0
}
}
void mmu_clean_invalidated_cache_index(int index)
{
__asm
{
mcr p15, 0, index, c7, c14, 2
}
}
void mmu_clean_invalidated_dcache(rt_uint32_t buffer, rt_uint32_t size)
{
unsigned int ptr;
ptr = buffer & ~0x1f;
while(ptr < buffer + size)
{
__asm
{
MCR p15, 0, ptr, c7, c14, 1
}
ptr += 32;
}
}
void mmu_clean_dcache(rt_uint32_t buffer, rt_uint32_t size)
{
unsigned int ptr;
ptr = buffer & ~0x1f;
while (ptr < buffer + size)
{
__asm
{
MCR p15, 0, ptr, c7, c10, 1
}
ptr += 32;
}
}
void mmu_invalidate_dcache(rt_uint32_t buffer, rt_uint32_t size)
{
unsigned int ptr;
ptr = buffer & ~0x1f;
while (ptr < buffer + size)
{
__asm
{
MCR p15, 0, ptr, c7, c6, 1
}
ptr += 32;
}
}
void mmu_invalidate_tlb()
{
register rt_uint32_t value;
value = 0;
__asm
{
mcr p15, 0, value, c8, c7, 0
}
}
void mmu_invalidate_icache()
{
register rt_uint32_t value;
value = 0;
__asm
{
mcr p15, 0, value, c7, c5, 0
}
}
#elif defined(__GNUC__)
void mmu_setttbase(register rt_uint32_t i)
{
register rt_uint32_t value;
/* Invalidates all TLBs.Domain access is selected as
* client by configuring domain access register,
* in that case access controlled by permission value
* set by page table entry
*/
value = 0;
asm ("mcr p15, 0, %0, c8, c7, 0"::"r"(value));
value = 0x55555555;
asm ("mcr p15, 0, %0, c3, c0, 0"::"r"(value));
asm ("mcr p15, 0, %0, c2, c0, 0"::"r"(i));
}
void mmu_set_domain(register rt_uint32_t i)
{
asm ("mcr p15,0, %0, c3, c0, 0": :"r" (i));
}
void mmu_enable()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i |= 0x1;
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_disable()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i &= ~0x1;
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_enable_icache()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i |= (1 << 12);
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_enable_dcache()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i |= (1 << 2);
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_disable_icache()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i &= ~(1 << 12);
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_disable_dcache()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i &= ~(1 << 2);
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_enable_alignfault()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i |= (1 << 1);
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_disable_alignfault()
{
register rt_uint32_t i;
/* read control register */
asm ("mrc p15, 0, %0, c1, c0, 0":"=r" (i));
i &= ~(1 << 1);
/* write back to control register */
asm ("mcr p15, 0, %0, c1, c0, 0": :"r" (i));
}
void mmu_clean_invalidated_cache_index(int index)
{
asm ("mcr p15, 0, %0, c7, c14, 2": :"r" (index));
}
void mmu_clean_dcache(rt_uint32_t buffer, rt_uint32_t size)
{
unsigned int ptr;
ptr = buffer & ~0x1f;
while (ptr < buffer + size)
{
asm ("mcr p15, 0, %0, c7, c10, 1": :"r" (ptr));
ptr += 32;
}
}
void mmu_invalidate_dcache(rt_uint32_t buffer, rt_uint32_t size)
{
unsigned int ptr;
ptr = buffer & ~0x1f;
while (ptr < buffer + size)
{
asm ("mcr p15, 0, %0, c7, c6, 1": :"r" (ptr));
ptr += 32;
}
}
void mmu_invalidate_tlb()
{
asm ("mcr p15, 0, %0, c8, c7, 0": :"r" (0));
}
void mmu_invalidate_icache()
{
asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (0));
}
#endif
/* level1 page table */
static volatile unsigned int _page_table[4*1024] __attribute__((aligned(16*1024)));
void mmu_setmtt(rt_uint32_t vaddrStart, rt_uint32_t vaddrEnd, rt_uint32_t paddrStart, rt_uint32_t attr)
{
volatile rt_uint32_t *pTT;
volatile int i,nSec;
pTT=(rt_uint32_t *)_page_table+(vaddrStart>>20);
nSec=(vaddrEnd>>20)-(vaddrStart>>20);
for(i=0;i<=nSec;i++)
{
*pTT = attr |(((paddrStart>>20)+i)<<20);
pTT++;
}
}
void rt_hw_mmu_init(void)
{
/* disable I/D cache */
mmu_disable_dcache();
mmu_disable_icache();
mmu_disable();
mmu_invalidate_tlb();
/* set page table */
mmu_setmtt(0x00000000, 0xFFFFFFFF, 0x00000000, RW_NCNB); /* None cached for 4G memory */
mmu_setmtt(0xC0000000, 0xC8000000-1, 0xC0000000, RW_CB); /* 128M cached DDR memory */
mmu_setmtt(0xD0000000, 0xD8000000-1, 0xC0000000, RW_NCNB); /* 128M none-cached DDR memory */
mmu_setmtt(0x80000000, 0x80020000-1, 0x80000000, RW_CB); /* 128k OnChip memory */
/* set MMU table address */
mmu_setttbase((rt_uint32_t)_page_table);
/* enables MMU */
mmu_enable();
/* enable Instruction Cache */
mmu_enable_icache();
/* enable Data Cache */
mmu_enable_dcache();
}
libcpu/arm/am335x/stack.c
+65
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/*
* File : stack.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2011, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-09-23 Bernard the first version
* 2011-10-05 Bernard add thumb mode
*/
#include <rtthread.h>
#include "am33xx.h"
/**
* @addtogroup AM33xx
*/
/*@{*/
/**
* This function will initialize thread stack
*
* @param tentry the entry of thread
* @param parameter the parameter of entry
* @param stack_addr the beginning stack address
* @param texit the function will be called when thread exit
*
* @return stack address
*/
rt_uint8_t *rt_hw_stack_init(void *tentry, void *parameter,
rt_uint8_t *stack_addr, void *texit)
{
rt_uint32_t *stk;
stk = (rt_uint32_t*)stack_addr;
*(stk) = (rt_uint32_t)tentry; /* entry point */
*(--stk) = (rt_uint32_t)texit; /* lr */
*(--stk) = 0; /* r12 */
*(--stk) = 0; /* r11 */
*(--stk) = 0; /* r10 */
*(--stk) = 0; /* r9 */
*(--stk) = 0; /* r8 */
*(--stk) = 0; /* r7 */
*(--stk) = 0; /* r6 */
*(--stk) = 0; /* r5 */
*(--stk) = 0; /* r4 */
*(--stk) = 0; /* r3 */
*(--stk) = 0; /* r2 */
*(--stk) = 0; /* r1 */
*(--stk) = (rt_uint32_t)parameter; /* r0 : argument */
/* cpsr */
if ((rt_uint32_t)tentry & 0x01)
*(--stk) = SVCMODE | 0x20; /* thumb mode */
else
*(--stk) = SVCMODE; /* arm mode */
/* return task's current stack address */
return (rt_uint8_t *)stk;
}
/*@}*/
libcpu/arm/am335x/start_gcc.S
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/*
* File : start_gcc.S
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2013, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2013-07-05 Bernard the first version
*/
.equ Mode_USR, 0x10
.equ Mode_FIQ, 0x11
.equ Mode_IRQ, 0x12
.equ Mode_SVC, 0x13
.equ Mode_ABT, 0x17
.equ Mode_UND, 0x1B
.equ Mode_SYS, 0x1F
.equ I_Bit, 0x80 @ when I bit is set, IRQ is disabled
.equ F_Bit, 0x40 @ when F bit is set, FIQ is disabled
.equ UND_Stack_Size, 0x00000000
.equ SVC_Stack_Size, 0x00000100
.equ ABT_Stack_Size, 0x00000000
.equ FIQ_Stack_Size, 0x00000000
.equ IRQ_Stack_Size, 0x00000100
.equ USR_Stack_Size, 0x00000100
#define ISR_Stack_Size (UND_Stack_Size + SVC_Stack_Size + ABT_Stack_Size + \
FIQ_Stack_Size + IRQ_Stack_Size)
/* stack */
.globl stack_start
.globl stack_top
stack_start:
.rept ISR_Stack_Size
.long 0
.endr
stack_top:
/* reset entry */
.globl _reset
_reset:
/* set the cpu to SVC32 mode and disable interrupt */
mrs r0, cpsr
bic r0, r0, #0x1f
orr r0, r0, #0x13
msr cpsr_c, r0
/* setup stack */
bl stack_setup
/* clear .bss */
mov r0,#0 /* get a zero */
ldr r1,=__bss_start /* bss start */
ldr r2,=__bss_end /* bss end */
bss_loop:
cmp r1,r2 /* check if data to clear */
strlo r0,[r1],#4 /* clear 4 bytes */
blo bss_loop /* loop until done */
/* call C++ constructors of global objects */
ldr r0, =__ctors_start__
ldr r1, =__ctors_end__
ctor_loop:
cmp r0, r1
beq ctor_end
ldr r2, [r0], #4
stmfd sp!, {r0-r1}
mov lr, pc
bx r2
ldmfd sp!, {r0-r1}
b ctor_loop
ctor_end:
/* start RT-Thread Kernel */
ldr pc, _rtthread_startup
_rtthread_startup:
.word rtthread_startup
stack_setup:
ldr r0, =stack_top
@ Enter Undefined Instruction Mode and set its Stack Pointer
msr cpsr_c, #Mode_UND|I_Bit|F_Bit
mov sp, r0
sub r0, r0, #UND_Stack_Size
@ Enter Abort Mode and set its Stack Pointer
msr cpsr_c, #Mode_ABT|I_Bit|F_Bit
mov sp, r0
sub r0, r0, #ABT_Stack_Size
@ Enter FIQ Mode and set its Stack Pointer
msr cpsr_c, #Mode_FIQ|I_Bit|F_Bit
mov sp, r0
sub r0, r0, #FIQ_Stack_Size
@ Enter IRQ Mode and set its Stack Pointer
msr cpsr_c, #Mode_IRQ|I_Bit|F_Bit
mov sp, r0
sub r0, r0, #IRQ_Stack_Size
@ Enter Supervisor Mode and set its Stack Pointer
msr cpsr_c, #Mode_SVC|I_Bit|F_Bit
mov sp, r0
sub r0, r0, #SVC_Stack_Size
@ Enter User Mode and set its Stack Pointer
mov sp, r0
sub sl, sp, #USR_Stack_Size
bx lr
/* exception handlers: undef, swi, padt, dabt, resv, irq, fiq */
.align 5
.globl vector_undef
vector_undef:
sub sp, sp, #72
stmia sp, {r0 - r12} @/* Calling r0-r12 */
add r8, sp, #60
stmdb r8, {sp, lr} @/* Calling SP, LR */
str lr, [r8, #0] @/* Save calling PC */
mrs r6, spsr
str r6, [r8, #4] @/* Save CPSR */
str r0, [r8, #8] @/* Save OLD_R0 */
mov r0, sp
bl rt_hw_trap_udef
.align 5
.globl vector_swi
vector_swi:
bl rt_hw_trap_swi
.align 5
.globl vector_pabt
vector_pabt:
bl rt_hw_trap_pabt
.align 5
.globl vector_dabt
vector_dabt:
sub sp, sp, #72
stmia sp, {r0 - r12} @/* Calling r0-r12 */
add r8, sp, #60
stmdb r8, {sp, lr} @/* Calling SP, LR */
str lr, [r8, #0] @/* Save calling PC */
mrs r6, spsr
str r6, [r8, #4] @/* Save CPSR */
str r0, [r8, #8] @/* Save OLD_R0 */
mov r0, sp
bl rt_hw_trap_dabt
.align 5
.globl vector_resv
vector_resv:
b .
.align 5
.globl vector_fiq
vector_fiq:
stmfd sp!,{r0-r7,lr}
bl rt_hw_trap_fiq
ldmfd sp!,{r0-r7,lr}
subs pc,lr,#4
.globl rt_interrupt_enter
.globl rt_interrupt_leave
.globl rt_thread_switch_interrupt_flag
.globl rt_interrupt_from_thread
.globl rt_interrupt_to_thread
.globl rt_current_thread
.globl vmm_thread
.globl vmm_virq_check
.globl vector_irq
vector_irq:
stmfd sp!, {r0-r12,lr}
bl rt_interrupt_enter
bl rt_hw_trap_irq
bl rt_interrupt_leave
@ if rt_thread_switch_interrupt_flag set, jump to
@ rt_hw_context_switch_interrupt_do and don't return
ldr r0, =rt_thread_switch_interrupt_flag
ldr r1, [r0]
cmp r1, #1
beq rt_hw_context_switch_interrupt_do
ldmfd sp!, {r0-r12,lr}
subs pc, lr, #4
rt_hw_context_switch_interrupt_do:
mov r1, #0 @ clear flag
str r1, [r0]
ldmfd sp!, {r0-r12,lr}@ reload saved registers
stmfd sp, {r0-r2} @ save r0-r2
mrs r0, spsr @ get cpsr of interrupt thread
sub r1, sp, #4*3
sub r2, lr, #4 @ save old task's pc to r2
@ switch to SVC mode with no interrupt
msr cpsr_c, #I_Bit|F_Bit|Mode_SVC
stmfd sp!, {r2} @ push old task's pc
stmfd sp!, {r3-r12,lr}@ push old task's lr,r12-r4
ldmfd r1, {r1-r3} @ restore r0-r2 of the interrupt thread
stmfd sp!, {r1-r3} @ push old task's r0-r2
stmfd sp!, {r0} @ push old task's cpsr
ldr r4, =rt_interrupt_from_thread
ldr r5, [r4]
str sp, [r5] @ store sp in preempted tasks's TCB
ldr r6, =rt_interrupt_to_thread
ldr r6, [r6]
ldr sp, [r6] @ get new task's stack pointer
ldmfd sp!, {r4} @ pop new task's cpsr to spsr
msr spsr_cxsf, r4
ldmfd sp!, {r0-r12,lr,pc}^ @ pop new task's r0-r12,lr & pc, copy spsr to cpsr
libcpu/arm/am335x/trap.c
+182
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/*
* File : trap.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2006, RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2011-09-23 Bernard first version
*/
#include <rtthread.h>
#include <rthw.h>
#include "am33xx.h"
#include "interrupt.h"
/**
* @addtogroup AM33XX
*/
/*@{*/
extern struct rt_thread *rt_current_thread;
#ifdef RT_USING_FINSH
extern long list_thread(void);
#endif
/**
* this function will show registers of CPU
*
* @param regs the registers point
*/
void rt_hw_show_register (struct rt_hw_register *regs)
{
rt_kprintf("Execption:\n");
rt_kprintf("r00:0x%08x r01:0x%08x r02:0x%08x r03:0x%08x\n", regs->r0, regs->r1, regs->r2, regs->r3);
rt_kprintf("r04:0x%08x r05:0x%08x r06:0x%08x r07:0x%08x\n", regs->r4, regs->r5, regs->r6, regs->r7);
rt_kprintf("r08:0x%08x r09:0x%08x r10:0x%08x\n", regs->r8, regs->r9, regs->r10);
rt_kprintf("fp :0x%08x ip :0x%08x\n", regs->fp, regs->ip);
rt_kprintf("sp :0x%08x lr :0x%08x pc :0x%08x\n", regs->sp, regs->lr, regs->pc);
rt_kprintf("cpsr:0x%08x\n", regs->cpsr);
}
/**
* When ARM7TDMI comes across an instruction which it cannot handle,
* it takes the undefined instruction trap.
*
* @param regs system registers
*
* @note never invoke this function in application
*/
void rt_hw_trap_udef(struct rt_hw_register *regs)
{
rt_hw_show_register(regs);
rt_kprintf("undefined instruction\n");
rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
#ifdef RT_USING_FINSH
list_thread();
#endif
rt_hw_cpu_shutdown();
}
/**
* The software interrupt instruction (SWI) is used for entering
* Supervisor mode, usually to request a particular supervisor
* function.
*
* @param regs system registers
*
* @note never invoke this function in application
*/
void rt_hw_trap_swi(struct rt_hw_register *regs)
{
rt_hw_show_register(regs);
rt_kprintf("software interrupt\n");
rt_hw_cpu_shutdown();
}
/**
* An abort indicates that the current memory access cannot be completed,
* which occurs during an instruction prefetch.
*
* @param regs system registers
*
* @note never invoke this function in application
*/
void rt_hw_trap_pabt(struct rt_hw_register *regs)
{
rt_hw_show_register(regs);
rt_kprintf("prefetch abort\n");
rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
#ifdef RT_USING_FINSH
list_thread();
#endif
rt_hw_cpu_shutdown();
}
/**
* An abort indicates that the current memory access cannot be completed,
* which occurs during a data access.
*
* @param regs system registers
*
* @note never invoke this function in application
*/
void rt_hw_trap_dabt(struct rt_hw_register *regs)
{
rt_hw_show_register(regs);
rt_kprintf("data abort\n");
rt_kprintf("thread %.*s stack:\n", RT_NAME_MAX, rt_current_thread->name);
#ifdef RT_USING_FINSH
list_thread();
#endif
rt_hw_cpu_shutdown();
}
void rt_hw_trap_irq()
{
void *param;
unsigned long ir;
rt_isr_handler_t isr_func;
extern struct rt_irq_desc isr_table[];
ir = rt_hw_interrupt_get_active(INT_IRQ);
if (ir == 127)
{
/* new IRQ generation */
rt_hw_interrupt_ack(INT_IRQ);
ir = rt_hw_interrupt_get_active(INT_IRQ);
if (ir == 127)
{
/* still spurious interrupt, get out */
/*rt_kprintf("still spurious interrupt\n");*/
return;
}
/*rt_kprintf("new IRQ: %d\n", ir);*/
}
/* get interrupt service routine */
isr_func = isr_table[ir].handler;
param = isr_table[ir].param;
/* turn to interrupt service routine */
if (isr_func != RT_NULL)
isr_func(ir, param);
/* new IRQ generation */
rt_hw_interrupt_ack(INT_IRQ);
}
void rt_hw_trap_fiq()
{
void *param;
unsigned long ir;
rt_isr_handler_t isr_func;
extern struct rt_irq_desc isr_table[];
ir = rt_hw_interrupt_get_active(INT_FIQ);
/* get interrupt service routine */
isr_func = isr_table[ir].handler;
param = isr_table[ir].param;
/* turn to interrupt service routine */
isr_func(ir, param);
/* new FIQ generation */
rt_hw_interrupt_ack(INT_FIQ);
}
/*@}*/
libcpu/arm/am335x/vector_gcc.S
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/*
* File : vector_gcc.S
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2013, RT-Thread Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Change Logs:
* Date Author Notes
* 2013-07-05 Bernard the first version
*/
.section .vectors, "ax"
.code 32
.globl system_vectors
system_vectors:
ldr pc, _vector_reset
ldr pc, _vector_undef
ldr pc, _vector_swi
ldr pc, _vector_pabt
ldr pc, _vector_dabt
ldr pc, _vector_resv
ldr pc, _vector_irq
ldr pc, _vector_fiq
.globl _reset
.globl vector_undef
.globl vector_swi
.globl vector_pabt
.globl vector_dabt
.globl vector_resv
.globl vector_irq
.globl vector_fiq
_vector_reset:
.word _reset
_vector_undef:
.word vector_undef
_vector_swi:
.word vector_swi
_vector_pabt:
.word vector_pabt
_vector_dabt:
.word vector_dabt
_vector_resv:
.word vector_resv
_vector_irq:
.word vector_irq
_vector_fiq:
.word vector_fiq
.balignl 16,0xdeadbeef