diff options
| -rw-r--r-- | cmd/elf.c | 19 | ||||
| -rw-r--r-- | include/vxworks.h | 26 |
2 files changed, 45 insertions, 0 deletions
@@ -20,6 +20,7 @@ #include <net.h> #include <vxworks.h> #ifdef CONFIG_X86 +#include <vbe.h> #include <asm/e820.h> #include <linux/linkage.h> #endif @@ -254,6 +255,8 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) ulong base; struct e820_info *info; struct e820_entry *data; + struct efi_gop_info *gop; + struct vesa_mode_info *vesa = &mode_info.vesa; #endif /* @@ -397,6 +400,22 @@ int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) * available memory size for the kernel is insane. */ *(u32 *)(base + BOOT_IMAGE_SIZE_OFFSET) = 0; + + /* + * Prepare compatible framebuffer information block. + * The VESA mode has to be 32-bit RGBA. + */ + if (vesa->x_resolution && vesa->y_resolution) { + gop = (struct efi_gop_info *)(base + EFI_GOP_INFO_OFFSET); + gop->magic = EFI_GOP_INFO_MAGIC; + gop->info.version = 0; + gop->info.width = vesa->x_resolution; + gop->info.height = vesa->y_resolution; + gop->info.pixel_format = EFI_GOT_RGBA8; + gop->info.pixels_per_scanline = vesa->bytes_per_scanline / 4; + gop->fb_base = vesa->phys_base_ptr; + gop->fb_size = vesa->bytes_per_scanline * vesa->y_resolution; + } #endif /* diff --git a/include/vxworks.h b/include/vxworks.h index 4a83a34dfb..b1b5096b90 100644 --- a/include/vxworks.h +++ b/include/vxworks.h @@ -8,6 +8,8 @@ #ifndef _VXWORKS_H_ #define _VXWORKS_H_ +#include <efi_api.h> + /* * Physical address of memory base for VxWorks x86 * This is LOCAL_MEM_LOCAL_ADRS in the VxWorks kernel configuration. @@ -52,6 +54,30 @@ struct e820_info { */ #define BOOT_IMAGE_SIZE_OFFSET 0x5004 +/* + * When booting from EFI BIOS, VxWorks bootloader stores the EFI GOP + * framebuffer info at a pre-defined offset @ 0x6100. When VxWorks kernel + * boots up, its EFI console driver tries to find such a block and if + * the signature matches, the framebuffer information will be used to + * initialize the driver. + * + * However it is not necessary to prepare an EFI environment for VxWorks's + * EFI console driver to function (eg: EFI loader in U-Boot). If U-Boot has + * already initialized the graphics card and set it to a VESA mode that is + * compatible with EFI GOP, we can simply prepare such a block for VxWorks. + */ +#define EFI_GOP_INFO_OFFSET 0x6100 + +/* EFI GOP info signatiure */ +#define EFI_GOP_INFO_MAGIC 0xfeedface + +struct efi_gop_info { + u32 magic; /* signature */ + struct efi_gop_mode_info info; /* EFI GOP mode info structure */ + phys_addr_t fb_base; /* framebuffer base address */ + u32 fb_size; /* framebuffer size */ +}; + int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]); void boot_prep_vxworks(bootm_headers_t *images); void boot_jump_vxworks(bootm_headers_t *images); |