diff options
| author | Bin Meng <bmeng.cn@gmail.com> | 2015-06-23 12:18:52 +0800 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2015-07-14 18:03:17 -0600 |
| commit | 07545d861ccc54aecbeaa51b264258b90912b856 (patch) | |
| tree | 3e64d07fec4397bf2b7dc0433ca74b184b6c3318 /arch/x86/lib/tables.c | |
| parent | 7f5df8d42d8eb0fbdb6bf168fd530aa0f01b99c7 (diff) | |
x86: Generate a valid MultiProcessor (MP) table
Implement write_mp_table() to create a minimal working MP table.
This includes an MP floating table, a configuration table header
and all of the 5 base configuration table entries. The I/O interrupt
assignment table entry is created based on the same information used
in the creation of PIRQ routing table from device tree. A check
duplicated entry logic is applied to prevent writing multiple I/O
interrupt entries with the same information.
Use a Kconfig option GENERATE_MP_TABLE to tell U-Boot whether we
need actually write the MP table at the F seg, just like we did for
PIRQ routing and SFI tables. With MP table existence, linux kernel
will switch to I/O APIC and local APIC to process all the peripheral
interrupts instead of 8259 PICs. This takes full advantage of the
multicore hardware and the SMP kernel.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/lib/tables.c')
| -rw-r--r-- | arch/x86/lib/tables.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c index 41c50bc876..75ffbc1b22 100644 --- a/arch/x86/lib/tables.c +++ b/arch/x86/lib/tables.c @@ -6,6 +6,7 @@ #include <common.h> #include <asm/sfi.h> +#include <asm/mpspec.h> #include <asm/tables.h> u8 table_compute_checksum(void *v, int len) @@ -46,4 +47,8 @@ void write_tables(void) rom_table_end = write_sfi_table(rom_table_end); rom_table_end = ALIGN(rom_table_end, 1024); #endif +#ifdef CONFIG_GENERATE_MP_TABLE + rom_table_end = write_mp_table(rom_table_end); + rom_table_end = ALIGN(rom_table_end, 1024); +#endif } |