mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-26 11:41:35 +01:00
26cab92bfc
test-baremetal: fix missing setting x0 return value Examples were just returning on ret without setting x0, which led to failures... those were not noticed because of how broken the testing system was ;-)
39 lines
656 B
ArmAsm
39 lines
656 B
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#arm-multicore */
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.global main
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main:
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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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cpu1_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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cpu1_sleep_forever:
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wfe
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b cpu1_sleep_forever
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cpu0_only:
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#if !defined(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, =cpu1_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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mov r0, #0
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bx lr
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spinlock:
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.skip 4
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