From 3cf23719b1dc97d17ed649493b0b61641a79ab1f Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Sun, 28 Feb 2016 23:54:50 -0800 Subject: x86: Support booting SeaBIOS SeaBIOS is an open source implementation of a 16-bit x86 BIOS. It can run in an emulator or natively on x86 hardware with the use of coreboot. With SeaBIOS's help, we can boot some OSes that require 16-bit BIOS services like Windows/DOS. As U-Boot, we have to manually create a table where SeaBIOS gets system information (eg: E820) from. The table unfortunately has to follow the coreboot table format as SeaBIOS currently supports booting as a coreboot payload. Signed-off-by: Bin Meng Reviewed-by: Simon Glass --- arch/x86/lib/tables.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'arch/x86/lib/tables.c') diff --git a/arch/x86/lib/tables.c b/arch/x86/lib/tables.c index eccef8a..a156f2c 100644 --- a/arch/x86/lib/tables.c +++ b/arch/x86/lib/tables.c @@ -10,6 +10,7 @@ #include #include #include +#include /** * Function prototype to write a specific configuration table @@ -67,22 +68,36 @@ void write_tables(void) { u32 rom_table_start = ROM_TABLE_ADDR; u32 rom_table_end; +#ifdef CONFIG_SEABIOS u32 high_table, table_size; + struct memory_area cfg_tables[ARRAY_SIZE(table_write_funcs) + 1]; +#endif int i; for (i = 0; i < ARRAY_SIZE(table_write_funcs); i++) { rom_table_end = table_write_funcs[i](rom_table_start); rom_table_end = ALIGN(rom_table_end, ROM_TABLE_ALIGN); +#ifdef CONFIG_SEABIOS table_size = rom_table_end - rom_table_start; high_table = (u32)memalign(ROM_TABLE_ALIGN, table_size); if (high_table) { memset((void *)high_table, 0, table_size); table_write_funcs[i](high_table); + + cfg_tables[i].start = high_table; + cfg_tables[i].size = table_size; } else { printf("%d: no memory for configuration tables\n", i); } +#endif rom_table_start = rom_table_end; } + +#ifdef CONFIG_SEABIOS + /* make sure the last item is zero */ + cfg_tables[i].size = 0; + write_coreboot_table(CB_TABLE_ADDR, cfg_tables); +#endif } -- cgit v1.1