Commit 1c1378a4 authored Apr 18, 2023 by Huacai Chen

LoongArch: Enable PG when wakeup from suspend



Some firmwares don't enable PG when wakeup from suspend, so do it in
kernel. This can improve code compatibility for boot kernel.

Signed-off-by: Baoqi Zhang <zhangbaoqi@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

parent 6637775c

arch/loongarch/power/suspend_asm.S

+4 −0

Original line number	Diff line number	Diff line
		@@ -80,6 +80,10 @@ SYM_INNER_LABEL(loongarch_wakeup_start, SYM_L_GLOBAL)

		JUMP_VIRT_ADDR t0, t1

		/* Enable PG */
		li.w t0, 0xb0 # PLV=0, IE=0, PG=1
		csrwr t0, LOONGARCH_CSR_CRMD

		la.pcrel t0, acpi_saved_sp
		ld.d sp, t0, 0
		SETUP_WAKEUP