mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
b3874cc72b
To help with backtraces if we ever fix them due to the lkmc_asm_main_after_prologue debacle.
39 lines
657 B
ArmAsm
39 lines
657 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#arm-multicore */
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#include <lkmc.h>
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LKMC_PROLOGUE
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mov r0, 0
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ldr r1, =spinlock
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str r0, [r1]
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/* Get CPU ID. */
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mrc p15, 0, r1, c0, c0, 5
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ands r1, r1, 3
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beq cpu0_only
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.Lcpu1_only:
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mov r0, 1
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ldr r1, =spinlock
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str r0, [r1]
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dmb sy
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sev
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.Lcpu1_sleep_forever:
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wfe
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b .Lcpu1_sleep_forever
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cpu0_only:
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#if !LKMC_GEM5
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/* PSCI CPU_ON. */
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ldr r0, =0x84000003
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mov r1, 1
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ldr r2, =.Lcpu1_only
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mov r3, 0
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hvc 0
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#endif
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spinlock_start:
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ldr r0, spinlock
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wfe
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cmp r0, 0
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beq spinlock_start
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LKMC_EPILOGUE
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spinlock:
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.skip 4
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