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* Simplify acpi_add_table

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* fix some comments
* Simplify ACPI wakeup code and make it work without a memory hole
* Add resume entries to global GDT so we don't need our own for resume.
* add ECDT description to acpi.h for anyone who might need it  ;-) 
* remove rather stupid math to get the right number of MAX_ACPI_TABLES
  and just define a reasonable maximum for now.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Rudolf Marek <r.marek@assembler.cz>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4932 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer
2009-11-10 22:17:15 +00:00
committed by Stefan Reinauer
parent a0141f050b
commit c0ac7e9046
4 changed files with 198 additions and 105 deletions
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23
src/arch/i386/lib/c_start.S
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@@ -253,7 +253,16 @@ gdtaddr:
/* This is the gdt for GCC part of coreboot.
* It is different from the gdt in ROMCC/ASM part of coreboot
* which is defined in entry32.inc */ /* BUT WHY?? */
* which is defined in entry32.inc
*
* When the machine is initially started, we use a very simple
* gdt from rom (that in entry32.inc) which only contains those
* entries we need for protected mode.
*
* When we're executing code from RAM, we want to do more complex
* stuff, like initializing PCI option roms in real mode, or doing
* a resume from a suspend to ram.
*/
gdt:
/* selgdt 0, unused */
.word 0x0000, 0x0000 /* dummy */
@@ -275,6 +284,8 @@ gdt:
.word 0x0000, 0x0000 /* dummy */
.byte 0x00, 0x00, 0x00, 0x00
/* The next two entries are used for executing VGA option ROMs */
/* selgdt 0x28 16-bit 64k code at 0x00000000 */
.word 0xffff, 0x0000
.byte 0, 0x9a, 0, 0
@@ -282,6 +293,16 @@ gdt:
/* selgdt 0x30 16-bit 64k data at 0x00000000 */
.word 0xffff, 0x0000
.byte 0, 0x92, 0, 0
/* The next two entries are used for ACPI S3 RESUME */
/* selgdt 0x38, flat data segment 16bit */
.word 0x0000, 0x0000 /* dummy */
.byte 0x00, 0x93, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */
/* selgdt 0x40, flat code segment 16bit */
.word 0xffff, 0x0000
.byte 0x00, 0x9b, 0x8f, 0x00 /* G=1 and 0x0f, So we get 4Gbytes for limit */
gdt_end:
idtarg: