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x86: Support writing configuration tables in high area

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For those secondary bootloaders like SeaBIOS who want to live in
the F segment, which conflicts the configuration table address,
now we allow write_tables() to write the configuration tables in
high area (malloc'ed memory).

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Bin Meng 2016-02-27 22:58:02 -08:00
parent ef4d0a524e
commit ff94c219e9
1 changed files with 11 additions and 0 deletions
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11
arch/x86/lib/tables.c
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@ -67,11 +67,22 @@ void write_tables(void)
{ {
u32 rom_table_start = ROM_TABLE_ADDR; u32 rom_table_start = ROM_TABLE_ADDR;
u32 rom_table_end; u32 rom_table_end;
u32 high_table, table_size;
int i; int i;
for (i = 0; i < ARRAY_SIZE(table_write_funcs); i++) { for (i = 0; i < ARRAY_SIZE(table_write_funcs); i++) {
rom_table_end = table_write_funcs[i](rom_table_start); rom_table_end = table_write_funcs[i](rom_table_start);
rom_table_end = ALIGN(rom_table_end, ROM_TABLE_ALIGN); rom_table_end = ALIGN(rom_table_end, ROM_TABLE_ALIGN);
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);
} else {
printf("%d: no memory for configuration tables\n", i);
}
rom_table_start = rom_table_end; rom_table_start = rom_table_end;
} }
} }