mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-03 00:33:45 +09:00
6e6622de16
Now that we have a secure data section and space to store per-CPU target PC address, switch to it instead of storing the target PC on the stack. Also save clobbered r4-r7 registers on the stack and restore them on return in psci_cpu_on for Tegra, i.MX7, and LS102xA platforms. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Hans de Goede <hdegoede@redhat.com>
40 lines
525 B
ArmAsm
40 lines
525 B
ArmAsm
#include <config.h>
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#include <linux/linkage.h>
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#include <asm/armv7.h>
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#include <asm/arch-armv7/generictimer.h>
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#include <asm/psci.h>
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.pushsection ._secure.text, "ax"
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.arch_extension sec
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.globl psci_cpu_on
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psci_cpu_on:
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push {r4, r5, lr}
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mov r4, r0
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mov r5, r1
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mov r0, r1
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mov r1, r2
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bl psci_save_target_pc
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mov r0, r4
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mov r1, r5
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ldr r2, =psci_cpu_entry
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bl imx_cpu_on
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pop {r4, r5, pc}
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.globl psci_cpu_off
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psci_cpu_off:
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bl psci_cpu_off_common
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bl psci_get_cpu_id
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bl imx_cpu_off
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1: wfi
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b 1b
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.popsection
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