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>

diff --git a/arch/loongarch/power/suspend_asm.S b/arch/loongarch/power/suspend_asm.S
index 90da899c06a194989ee4c0044f7cc908131090e7..e2fc3b4e31f0019164f57de05c05324cc2bb391d 100644 (file)
--- a/arch/loongarch/power/suspend_asm.S
+++ b/arch/loongarch/power/suspend_asm.S
@@ -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