Revision 983fe826 target-arm/helper.c
| b/target-arm/helper.c | ||
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| 8 | 8 |
#include "helpers.h" |
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#include "qemu-common.h" |
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#include "host-utils.h" |
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#include "hw/loader.h" |
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|
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static uint32_t cortexa9_cp15_c0_c1[8] = |
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{ 0x1031, 0x11, 0x000, 0, 0x00100103, 0x20000000, 0x01230000, 0x00002111 };
|
| ... | ... | |
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#else |
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/* SVC mode with interrupts disabled. */ |
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env->uncached_cpsr = ARM_CPU_MODE_SVC | CPSR_A | CPSR_F | CPSR_I; |
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env->regs[15] = 0; |
|
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/* On ARMv7-M the CPSR_I is the value of the PRIMASK register, and is |
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clear at reset. */ |
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if (IS_M(env)) |
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clear at reset. Initial SP and PC are loaded from ROM. */ |
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if (IS_M(env)) {
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uint32_t pc; |
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uint8_t *rom; |
|
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env->uncached_cpsr &= ~CPSR_I; |
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rom = rom_ptr(0); |
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if (rom) {
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/* We should really use ldl_phys here, in case the guest |
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modified flash and reset itself. However images |
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loaded via -kenrel have not been copied yet, so load the |
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values directly from there. */ |
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env->regs[13] = ldl_p(rom); |
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pc = ldl_p(rom + 4); |
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env->thumb = pc & 1; |
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env->regs[15] = pc & ~1; |
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} |
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} |
|
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env->vfp.xregs[ARM_VFP_FPEXC] = 0; |
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env->cp15.c2_base_mask = 0xffffc000u; |
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#endif |
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env->regs[15] = 0; |
|
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tlb_flush(env, 1); |
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} |
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|
| ... | ... | |
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|
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type = env->regs[15]; |
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if (env->v7m.exception != 0) |
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armv7m_nvic_complete_irq(env->v7m.nvic, env->v7m.exception);
|
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armv7m_nvic_complete_irq(env->nvic, env->v7m.exception); |
|
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|
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/* Switch to the target stack. */ |
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switch_v7m_sp(env, (type & 4) != 0); |
| ... | ... | |
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one we're raising. */ |
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switch (env->exception_index) {
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case EXCP_UDEF: |
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armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_USAGE);
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armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_USAGE); |
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return; |
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case EXCP_SWI: |
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env->regs[15] += 2; |
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armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_SVC);
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armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_SVC); |
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return; |
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case EXCP_PREFETCH_ABORT: |
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case EXCP_DATA_ABORT: |
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armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_MEM);
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armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_MEM); |
|
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return; |
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case EXCP_BKPT: |
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if (semihosting_enabled) {
|
| ... | ... | |
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return; |
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} |
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} |
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armv7m_nvic_set_pending(env->v7m.nvic, ARMV7M_EXCP_DEBUG);
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armv7m_nvic_set_pending(env->nvic, ARMV7M_EXCP_DEBUG); |
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return; |
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case EXCP_IRQ: |
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env->v7m.exception = armv7m_nvic_acknowledge_irq(env->v7m.nvic);
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env->v7m.exception = armv7m_nvic_acknowledge_irq(env->nvic); |
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break; |
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case EXCP_EXCEPTION_EXIT: |
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do_v7m_exception_exit(env); |
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