We can write the configuration table in last_stage_init() for all x86 boards, but not with coreboot since coreboot already has them.
Signed-off-by: Bin Meng bmeng.cn@gmail.com ---
arch/x86/cpu/cpu.c | 10 +++++++++ arch/x86/include/asm/tables.h | 49 +++++++++++++++++++++++++++++++++++++++++++ arch/x86/lib/Makefile | 1 + arch/x86/lib/tables.c | 30 ++++++++++++++++++++++++++ include/configs/x86-common.h | 1 + 5 files changed, 91 insertions(+) create mode 100644 arch/x86/include/asm/tables.h create mode 100644 arch/x86/lib/tables.c
diff --git a/arch/x86/cpu/cpu.c b/arch/x86/cpu/cpu.c index a9ca50b..c9614f1 100644 --- a/arch/x86/cpu/cpu.c +++ b/arch/x86/cpu/cpu.c @@ -29,6 +29,7 @@ #include <asm/processor.h> #include <asm/processor-flags.h> #include <asm/interrupt.h> +#include <asm/tables.h> #include <linux/compiler.h>
DECLARE_GLOBAL_DATA_PTR; @@ -593,3 +594,12 @@ void show_boot_progress(int val) #endif outb(val, POST_PORT); } + +#ifndef CONFIG_SYS_COREBOOT +int last_stage_init(void) +{ + write_tables(); + + return 0; +} +#endif diff --git a/arch/x86/include/asm/tables.h b/arch/x86/include/asm/tables.h new file mode 100644 index 0000000..8146ba3 --- /dev/null +++ b/arch/x86/include/asm/tables.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) 2015, Bin Meng bmeng.cn@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef _X86_TABLES_H_ +#define _X86_TABLES_H_ + +/* + * All x86 tables happen to like the address range from 0xf0000 to 0x100000. + * We use 0xf0000 as the starting address to store those tables, including + * PIRQ routing table, Multi-Processor table and ACPI table. + */ +#define ROM_TABLE_ADDR 0xf0000 + +/** + * table_compute_checksum() - Compute a table checksum + * + * This computes an 8-bit checksum for the configuration table. + * All bytes in the configuration table, including checksum itself and + * reserved bytes must add up to zero. + * + * @v: configuration table base address + * @len: configuration table size + * @return: the 8-bit checksum + */ +u8 table_compute_checksum(void *v, int len); + +/** + * write_tables() - Write x86 configuration tables + * + * This writes x86 configuration tables, including PIRQ routing table, + * Multi-Processor table and ACPI table. Whether a specific type of + * configuration table is written is controlled by a Kconfig option. + */ +void write_tables(void); + +/** + * write_pirq_routing_table() - Write PIRQ routing table + * + * This writes PIRQ routing table at a given address. + * + * @start: start address to write PIRQ routing table + * @return: end address of PIRQ routing table + */ +u32 write_pirq_routing_table(u32 start); + +#endif /* _X86_TABLES_H_ */ diff --git a/arch/x86/lib/Makefile b/arch/x86/lib/Makefile index e49de05..0de0d89 100644 --- a/arch/x86/lib/Makefile +++ b/arch/x86/lib/Makefile @@ -26,6 +26,7 @@ obj-y += relocate.o obj-y += physmem.o obj-$(CONFIG_X86_RAMTEST) += ramtest.o obj-y += string.o +obj-y += tables.o obj-$(CONFIG_SYS_X86_TSC_TIMER) += tsc_timer.o obj-$(CONFIG_CMD_ZBOOT) += zimage.o obj-$(CONFIG_HAVE_FSP) += fsp/ diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c new file mode 100644 index 0000000..b390a4b --- /dev/null +++ b/arch/x86/lib/tables.c @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2015, Bin Meng bmeng.cn@gmail.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <asm/tables.h> + +u8 table_compute_checksum(void *v, int len) +{ + u8 *bytes = v; + u8 checksum = 0; + int i; + + for (i = 0; i < len; i++) + checksum -= bytes[i]; + + return checksum; +} + +void write_tables(void) +{ + u32 __maybe_unused rom_table_end = ROM_TABLE_ADDR; + +#if CONFIG_GENERATE_PIRQ_TABLE + rom_table_end = write_pirq_routing_table(rom_table_end); + rom_table_end = ALIGN(rom_table_end, 1024); +#endif +} diff --git a/include/configs/x86-common.h b/include/configs/x86-common.h index 07a5aca..3e21e09 100644 --- a/include/configs/x86-common.h +++ b/include/configs/x86-common.h @@ -20,6 +20,7 @@ #define CONFIG_PHYSMEM #define CONFIG_DISPLAY_BOARDINFO_LATE #define CONFIG_DISPLAY_CPUINFO +#define CONFIG_LAST_STAGE_INIT
#define CONFIG_LMB #define CONFIG_OF_LIBFDT