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x86: bootm: Support booting a 64-bit raw kernel

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Detect an x86_64 kernel and boot it in 64-bit mode.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2014-10-10 08:21:58 -06:00
parent 5bda35cffa
commit 61643ae61a
1 changed files with 8 additions and 2 deletions
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10
arch/x86/lib/bootm.c
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@ -15,6 +15,7 @@
#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
@ -148,7 +149,11 @@ int boot_linux_kernel(ulong setup_base, ulong load_address, bool image_64bit)
timestamp_add_now(TS_U_BOOT_START_KERNEL);
#endif
if (image_64bit) {
/* TODO(boot 64-bit kernel) */
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
@ -178,7 +183,8 @@ 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);
return boot_linux_kernel(images->ep, images->os.load, false);
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[],