diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2009-08-29 15:03:59 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2009-08-31 11:09:40 +0200 |
| commit | 47a3d5da70f411bc044ecd3c0593b158b09d0efa (patch) | |
| tree | 30d5204e6d11cd81b20bc3fa582762cd4bdd3135 /arch | |
| parent | dd0a70c8f921708eba29ef9f30dde1f14a74af05 (diff) | |
x86: Add early platform detection
Platforms like Moorestown require early setup and want to avoid the
call to reserve_ebda_region. The x86_init override is too late when
the MRST detection happens in setup_arch. Move the default i386
x86_init overrides and the call to reserve_ebda_region into a separate
function which is called as the default of a switch case depending on
the hardware_subarch id in boot params. This allows us to add a case
for MRST and let MRST have its own early setup function.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/x86_init.h | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/head32.c | 22 | ||||
| -rw-r--r-- | arch/x86/kernel/head64.c | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/x86_init.c | 1 |
4 files changed, 20 insertions, 9 deletions
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h index 20df5187171..b6c89428137 100644 --- a/arch/x86/include/asm/x86_init.h +++ b/arch/x86/include/asm/x86_init.h @@ -2,6 +2,7 @@ #define _ASM_X86_PLATFORM_H #include <asm/pgtable_types.h> +#include <asm/bootparam.h> struct mpc_bus; struct mpc_cpu; @@ -34,14 +35,12 @@ struct x86_init_mpparse { * @probe_roms: probe BIOS roms * @reserve_resources: reserve the standard resources for the * platform - * @reserve_ebda_region: reserve the extended bios data area * @memory_setup: platform specific memory setup * */ struct x86_init_resources { void (*probe_roms)(void); void (*reserve_resources)(void); - void (*reserve_ebda_region)(void); char *(*memory_setup)(void); }; diff --git a/arch/x86/kernel/head32.c b/arch/x86/kernel/head32.c index a21398fac4f..441c075e2b8 100644 --- a/arch/x86/kernel/head32.c +++ b/arch/x86/kernel/head32.c @@ -15,6 +15,17 @@ #include <asm/trampoline.h> #include <asm/apic.h> #include <asm/io_apic.h> +#include <asm/bios_ebda.h> + +static void __init i386_default_early_setup(void) +{ + /* Initilize 32bit specific setup functions */ + x86_init.resources.probe_roms = probe_roms; + x86_init.resources.reserve_resources = i386_reserve_resources; + x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc; + + reserve_ebda_region(); +} void __init i386_start_kernel(void) { @@ -31,12 +42,13 @@ void __init i386_start_kernel(void) reserve_early(ramdisk_image, ramdisk_end, "RAMDISK"); } #endif - /* Initilize 32bit specific setup functions */ - x86_init.resources.probe_roms = probe_roms; - x86_init.resources.reserve_resources = i386_reserve_resources; - x86_init.mpparse.setup_ioapic_ids = setup_ioapic_ids_from_mpc; - x86_init.resources.reserve_ebda_region(); + /* Call the subarch specific early setup function */ + switch (boot_params.hdr.hardware_subarch) { + default: + i386_default_early_setup(); + break; + } /* * At this point everything still needed from the boot loader diff --git a/arch/x86/kernel/head64.c b/arch/x86/kernel/head64.c index cead8149c3d..0b06cd778fd 100644 --- a/arch/x86/kernel/head64.c +++ b/arch/x86/kernel/head64.c @@ -24,6 +24,7 @@ #include <asm/kdebug.h> #include <asm/e820.h> #include <asm/trampoline.h> +#include <asm/bios_ebda.h> static void __init zap_identity_mappings(void) { @@ -111,7 +112,7 @@ void __init x86_64_start_reservations(char *real_mode_data) } #endif - x86_init.resources.reserve_ebda_region(); + reserve_ebda_region(); /* * At this point everything still needed from the boot loader diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c index 13081b92191..24be7f39789 100644 --- a/arch/x86/kernel/x86_init.c +++ b/arch/x86/kernel/x86_init.c @@ -28,7 +28,6 @@ struct __initdata x86_init_ops x86_init = { .resources = { .probe_roms = x86_init_noop, .reserve_resources = reserve_standard_io_resources, - .reserve_ebda_region = reserve_ebda_region, .memory_setup = default_machine_specific_memory_setup, }, |