diff options
Diffstat (limited to 'arch/x86/lib/bootm.c')
-rw-r--r-- | arch/x86/lib/bootm.c | 56 |
1 files changed, 45 insertions, 11 deletions
diff --git a/arch/x86/lib/bootm.c b/arch/x86/lib/bootm.c index 4c5c7f5..86030cf 100644 --- a/arch/x86/lib/bootm.c +++ b/arch/x86/lib/bootm.c @@ -10,10 +10,12 @@ #include <common.h> #include <command.h> +#include <errno.h> #include <fdt_support.h> #include <image.h> #include <u-boot/zlib.h> #include <asm/bootparam.h> +#include <asm/cpu.h> #include <asm/byteorder.h> #include <asm/zimage.h> #ifdef CONFIG_SYS_COREBOOT @@ -109,17 +111,17 @@ static int boot_prep_linux(bootm_headers_t *images) } if (is_zimage) { - void *load_address; + ulong load_address; char *base_ptr; base_ptr = (char *)load_zimage(data, len, &load_address); - images->os.load = (ulong)load_address; + images->os.load = load_address; cmd_line_dest = base_ptr + COMMAND_LINE_OFFSET; images->ep = (ulong)base_ptr; } else if (images->ep) { cmd_line_dest = (void *)images->ep + COMMAND_LINE_OFFSET; } else { - printf("## Kernel loading failed (no setup) ...\n"); + printf("## Kernel loading failed (missing x86 kernel setup) ...\n"); goto error; } @@ -139,16 +141,50 @@ error: return 1; } +int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit) +{ + bootm_announce_and_cleanup(); + +#ifdef CONFIG_SYS_COREBOOT + timestamp_add_now(TS_U_BOOT_START_KERNEL); +#endif + if (image_64bit) { + if (!cpu_has_64bit()) { + puts("Cannot boot 64-bit kernel on 32-bit machine\n"); + return -EFAULT; + } + return cpu_jump_to_64bit(setup_base, load_address); + } else { + /* + * Set %ebx, %ebp, and %edi to 0, %esi to point to the + * boot_params structure, and then jump to the kernel. We + * assume that %cs is 0x10, 4GB flat, and read/execute, and + * the data segments are 0x18, 4GB flat, and read/write. + * U-boot is setting them up that way for itself in + * arch/i386/cpu/cpu.c. + */ + __asm__ __volatile__ ( + "movl $0, %%ebp\n" + "cli\n" + "jmp *%[kernel_entry]\n" + :: [kernel_entry]"a"(load_address), + [boot_params] "S"(setup_base), + "b"(0), "D"(0) + ); + } + + /* We can't get to here */ + return -EFAULT; +} + /* Subcommand: GO */ static int boot_jump_linux(bootm_headers_t *images) { debug("## Transferring control to Linux (at address %08lx, kernel %08lx) ...\n", images->ep, images->os.load); - boot_zimage((struct boot_params *)images->ep, (void *)images->os.load); - /* does not return */ - - return 1; + return boot_linux_kernel(images->ep, images->os.load, + images->os.arch == IH_ARCH_X86_64); } int do_bootm_linux(int flag, int argc, char * const argv[], @@ -161,10 +197,8 @@ int do_bootm_linux(int flag, int argc, char * const argv[], if (flag & BOOTM_STATE_OS_PREP) return boot_prep_linux(images); - if (flag & BOOTM_STATE_OS_GO) { - boot_jump_linux(images); - return 0; - } + if (flag & BOOTM_STATE_OS_GO) + return boot_jump_linux(images); return boot_jump_linux(images); } |