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| author |   Huang, Ying <ying.huang@intel.com> | 2008-03-28 10:49:44 +0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-04-26 21:34:42 +0200 |
| commit | 8b664aa66e824a0ddf4ec56d41fa0cf7bb374de6 (patch) | |
| tree | 57c5de72c38f630e126964b922c379c4a7e49100 /arch/x86/kernel/head64.c | |
| parent | x86, boot: add free_early to early reservation machanism (diff) | |
| download | linux-dev-8b664aa66e824a0ddf4ec56d41fa0cf7bb374de6.tar.xz linux-dev-8b664aa66e824a0ddf4ec56d41fa0cf7bb374de6.zip | |
x86, boot: add linked list of struct setup_data
This patch adds a field of 64-bit physical pointer to NULL terminated
single linked list of struct setup_data to real-mode kernel
header. This is used as a more extensible boot parameters passing
mechanism.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/kernel/head64.c')
| -rw-r--r-- | arch/x86/kernel/head64.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index d31d6b72d60d..e25c57b8aa84 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -11,6 +11,7 @@ #include <linux/string.h> #include <linux/percpu.h> #include <linux/start_kernel.h> +#include <linux/io.h> #include <asm/processor.h> #include <asm/proto.h> @@ -100,6 +101,24 @@ static void __init reserve_ebda_region(void) reserve_early(lowmem, 0x100000, "BIOS reserved"); } +static void __init reserve_setup_data(void) +{ + struct setup_data *data; + unsigned long pa_data; + char buf[32]; + + if (boot_params.hdr.version < 0x0209) + return; + pa_data = boot_params.hdr.setup_data; + while (pa_data) { + data = early_ioremap(pa_data, sizeof(*data)); + sprintf(buf, "setup data %x", data->type); + reserve_early(pa_data, pa_data+sizeof(*data)+data->len, buf); + pa_data = data->next; + early_iounmap(data, sizeof(*data)); + } +} + void __init x86_64_start_kernel(char * real_mode_data) { int i; @@ -156,6 +175,7 @@ void __init x86_64_start_kernel(char * real_mode_data) #endif reserve_ebda_region(); + reserve_setup_data(); /* * At this point everything still needed from the boot loader |