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arm: start documenting paging

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Ciro Santilli 六四事件 法轮功
2019-07-18 00:00:00 +00:00
parent 2b3e6bcff1
commit 3ea041e4d9
2 changed files with 34 additions and 0 deletions
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14
baremetal/arch/aarch64/dump_regs.c
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@@ -8,11 +8,25 @@ int main(void) {
__asm__ ("mrs %0, sctlr_el1" : "=r" (sctlr_el1) : :);
printf("SCTLR_EL1 0x%" PRIX32 "\n", sctlr_el1);
printf("SCTLR_EL1.A 0x%" PRIX32 "\n", (sctlr_el1 >> 1) & 1);
/* https://cirosantilli.com/linux-kernel-module-cheat#arm-paging */
printf("SCTLR_EL1.M 0x%" PRIX32 "\n", (sctlr_el1 >> 0) & 1);
uint64_t CurrentEL;
__asm__ ("mrs %0, CurrentEL;" : "=r" (CurrentEL) : :);
printf("CurrentEL 0x%" PRIX64 "\n", CurrentEL);
/* https://cirosantilli.com/linux-kernel-module-cheat#arm-exception-levels */
printf("CurrentEL.EL 0x%" PRIX64 "\n", CurrentEL >> 2);
/* https://cirosantilli.com/linux-kernel-module-cheat#arm-paging */
{
uint64_t tcr_el1;
__asm__ ("mrs %0, tcr_el1;" : "=r" (tcr_el1) : :);
printf("TCR_EL1 0x%" PRIX64 "\n", tcr_el1);
uint64_t ttbr0_el1;
__asm__ ("mrs %0, ttbr0_el1;" : "=r" (ttbr0_el1) : :);
printf("TTBR0_EL1 0x%" PRIX64 "\n", ttbr0_el1);
}
return 0;
}