diff options
Diffstat (limited to 'target/linux/at91/image/dfboot/src/asm_isr.S')
| -rw-r--r-- | target/linux/at91/image/dfboot/src/asm_isr.S | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/target/linux/at91/image/dfboot/src/asm_isr.S b/target/linux/at91/image/dfboot/src/asm_isr.S deleted file mode 100644 index 8d1d52e..0000000 --- a/target/linux/at91/image/dfboot/src/asm_isr.S +++ /dev/null @@ -1,75 +0,0 @@ -#include "AT91RM9200_inc.h" - -#define ARM_MODE_USER 0x10 -#define ARM_MODE_FIQ 0x11 -#define ARM_MODE_IRQ 0x12 -#define ARM_MODE_SVC 0x13 -#define ARM_MODE_ABORT 0x17 -#define ARM_MODE_UNDEF 0x1B -#define ARM_MODE_SYS 0x1F - -#define I_BIT 0x80 -#define F_BIT 0x40 -#define T_BIT 0x20 - - -/* ----------------------------------------------------------------------------- - AT91F_ASM_SPI_Handler - --------------------- - Handler called by the AIC - - Save context - Call C handler - Restore context - ----------------------------------------------------------------------------- */ - -.global AT91F_ST_ASM_HANDLER - -AT91F_ST_ASM_HANDLER: -/* Adjust and save LR_irq in IRQ stack */ - sub r14, r14, #4 - stmfd sp!, {r14} - -/* Write in the IVR to support Protect Mode - No effect in Normal Mode - De-assert the NIRQ and clear the source in Protect Mode */ - ldr r14, =AT91C_BASE_AIC - str r14, [r14, #AIC_IVR] - -/* Save SPSR and r0 in IRQ stack */ - mrs r14, SPSR - stmfd sp!, {r0, r14} - -/* Enable Interrupt and Switch in SYS Mode */ - mrs r0, CPSR - bic r0, r0, #I_BIT - orr r0, r0, #ARM_MODE_SYS - msr CPSR_c, r0 - -/* Save scratch/used registers and LR in User Stack */ - stmfd sp!, { r1-r3, r12, r14} - - ldr r1, =AT91F_ST_HANDLER - mov r14, pc - bx r1 - -/* Restore scratch/used registers and LR from User Stack */ - ldmia sp!, { r1-r3, r12, r14} - -/* Disable Interrupt and switch back in IRQ mode */ - mrs r0, CPSR - bic r0, r0, #ARM_MODE_SYS - orr r0, r0, #I_BIT | ARM_MODE_IRQ - msr CPSR_c, r0 - -/* Mark the End of Interrupt on the AIC */ - ldr r0, =AT91C_BASE_AIC - str r0, [r0, #AIC_EOICR] - -/* Restore SPSR_irq and r0 from IRQ stack */ - ldmia sp!, {r0, r14} - msr SPSR_cxsf, r14 - -/* Restore adjusted LR_irq from IRQ stack directly in the PC */ - ldmia sp!, {pc}^ - |