From b8b39bff3c7c07a5a8c85ebfd25d5b3ab3b3e2a1 Mon Sep 17 00:00:00 2001 From: Aaron Ma Date: Thu, 13 Sep 2018 02:00:08 +0800 Subject: efi/x86: earlyprintk - Add 64bit efi fb address support EFI GOP uses 64-bit frame buffer address in some BIOS. Add 64bit address support in efi earlyprintk. Signed-off-by: Aaron Ma Signed-off-by: Ard Biesheuvel --- arch/x86/platform/efi/early_printk.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'arch') diff --git a/arch/x86/platform/efi/early_printk.c b/arch/x86/platform/efi/early_printk.c index 5fdacb322ceb..7476b3b097e1 100644 --- a/arch/x86/platform/efi/early_printk.c +++ b/arch/x86/platform/efi/early_printk.c @@ -26,12 +26,14 @@ static bool early_efi_keep; */ static __init int early_efi_map_fb(void) { - unsigned long base, size; + u64 base, size; if (!early_efi_keep) return 0; base = boot_params.screen_info.lfb_base; + if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + base |= (u64)boot_params.screen_info.ext_lfb_base << 32; size = boot_params.screen_info.lfb_size; efi_fb = ioremap(base, size); @@ -46,9 +48,11 @@ early_initcall(early_efi_map_fb); */ static __ref void *early_efi_map(unsigned long start, unsigned long len) { - unsigned long base; + u64 base; base = boot_params.screen_info.lfb_base; + if (boot_params.screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE) + base |= (u64)boot_params.screen_info.ext_lfb_base << 32; if (efi_fb) return (efi_fb + start); -- cgit v1.2.3