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CBMEM high table memory manager. 

This code adds a very simple toc based memory manager for the high tables area.
The purpose of this code is to make it simpler and more reliable to find
certain data structures in memory. This will also make it possible to have ACPI
S3 Resume working without an ugly hole at 31MB.

Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Peter Stuge <peter@stuge.se>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@4860 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Stefan Reinauer 2009-10-26 17:04:28 +00:00 committed by Stefan Reinauer
parent a769344d43
commit 3b31402380
11 changed files with 540 additions and 151 deletions
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1
src/arch/i386/boot/Config.lb
View File

@ -19,3 +19,4 @@ if CONFIG_HAVE_ACPI_RESUME
object wakeup.S
end
end
object gdt.o

1
src/arch/i386/boot/Makefile.inc
View File

@ -1,6 +1,7 @@
obj-y += boot.o
obj-y += coreboot_table.o
obj-$(CONFIG_MULTIBOOT) += multiboot.o
obj-y += gdt.o
obj-y += tables.o
obj-$(CONFIG_GENERATE_PIRQ_TABLE) += pirq_routing.o
obj-$(CONFIG_GENERATE_ACPI_TABLES) += acpi.o

59
src/arch/i386/boot/gdt.c Normal file
View File

@ -0,0 +1,59 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2008-2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <types.h>
#include <string.h>
#include <cbmem.h>
#include <console/console.h>
// Global Descriptor Table, defined in c_start.S
extern char gdt;
extern char gdt_end;
/* i386 lgdt argument */
struct gdtarg {
u16 limit;
u32 base;
} __attribute__((packed));
// Copy GDT to new location and reload it
void move_gdt(void)
{
void *newgdt;
u16 num_gdt_bytes = &gdt_end - &gdt;
struct gdtarg gdtarg;
newgdt = cbmem_find(CBMEM_ID_GDT);
if (!newgdt) {
newgdt = cbmem_add(CBMEM_ID_GDT, ALIGN(num_gdt_bytes, 512));
if (!newgdt) {
printk(BIOS_ERR, "Error: Could not relocate GDT.\n");
return;
}
printk_debug("Moving GDT to %#lx...", newgdt);
memcpy((void*)newgdt, &gdt, num_gdt_bytes);
}
gdtarg.base = newgdt;
gdtarg.limit = num_gdt_bytes - 1;
__asm__ __volatile__ ("lgdt %0\n\t" : : "m" (gdtarg));
printk_debug("ok\n");
}

202
src/arch/i386/boot/tables.c
View File

@ -19,8 +19,6 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* 2006.1 yhlu add mptable cross 0x467 processing */
#include <console/console.h>
#include <cpu/cpu.h>
#include <boot/tables.h>
@ -31,34 +29,20 @@
#include <string.h>
#include <cpu/x86/multiboot.h>
#include "coreboot_table.h"
// Global Descriptor Table, defined in c_start.S
extern uint8_t gdt;
extern uint8_t gdt_end;
/* i386 lgdt argument */
struct gdtarg {
unsigned short limit;
unsigned int base;
} __attribute__((packed));
// Copy GDT to new location and reload it
void move_gdt(unsigned long newgdt)
{
uint16_t num_gdt_bytes = &gdt_end - &gdt;
struct gdtarg gdtarg;
printk_debug("Moving GDT to %#lx...", newgdt);
memcpy((void*)newgdt, &gdt, num_gdt_bytes);
gdtarg.base = newgdt;
gdtarg.limit = num_gdt_bytes - 1;
__asm__ __volatile__ ("lgdt %0\n\t" : : "m" (gdtarg));
printk_debug("ok\n");
}
#include <cbmem.h>
uint64_t high_tables_base = 0;
uint64_t high_tables_size;
void cbmem_list(void);
void move_gdt(void);
void cbmem_arch_init(void)
{
/* defined in gdt.c */
move_gdt();
}
struct lb_memory *write_tables(void)
{
unsigned long low_table_start, low_table_end;
@ -68,15 +52,16 @@ struct lb_memory *write_tables(void)
* the low and the high area, so payloads and OSes don't need to know
* about the high tables.
*/
unsigned long high_table_end=0;
unsigned long high_table_pointer;
if (high_tables_base) {
printk_debug("High Tables Base is %llx.\n", high_tables_base);
high_table_end = high_tables_base;
} else {
if (!high_tables_base) {
printk_err("ERROR: High Tables Base is not set.\n");
// Are there any boards without?
// Stepan thinks we should die() here!
}
printk_debug("High Tables Base is %llx.\n", high_tables_base);
rom_table_start = 0xf0000;
rom_table_end = 0xf0000;
@ -87,7 +72,9 @@ struct lb_memory *write_tables(void)
low_table_start = 0;
low_table_end = 0x500;
post_code(0x99);
#if CONFIG_GENERATE_PIRQ_TABLE == 1
#define MAX_PIRQ_TABLE_SIZE (4 * 1024)
post_code(0x9a);
/* This table must be between 0x0f0000 and 0x100000 */
rom_table_end = write_pirq_routing_table(rom_table_end);
@ -96,26 +83,87 @@ struct lb_memory *write_tables(void)
/* And add a high table version for those payloads that
* want to live in the F segment
*/
if (high_tables_base) {
high_table_end = write_pirq_routing_table(high_table_end);
high_table_end = ALIGN(high_table_end, 1024);
high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_PIRQ, MAX_PIRQ_TABLE_SIZE);
if (high_table_pointer) {
unsigned long new_high_table_pointer;
new_high_table_pointer = write_pirq_routing_table(high_table_pointer);
// FIXME make pirq table code intelligent enough to know how
// much space it's going to need.
if (new_high_table_pointer > (high_table_pointer + MAX_PIRQ_TABLE_SIZE)) {
printk(BIOS_ERR, "ERROR: Increase PIRQ size.\n");
}
printk(BIOS_DEBUG, "PIRQ table: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
}
post_code(0x9a);
#endif
#if CONFIG_GENERATE_MP_TABLE == 1
#define MAX_MP_TABLE_SIZE (4 * 1024)
post_code(0x9b);
/* The smp table must be in 0-1K, 639K-640K, or 960K-1M */
rom_table_end = write_smp_table(rom_table_end);
rom_table_end = ALIGN(rom_table_end, 1024);
high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_MPTABLE, MAX_MP_TABLE_SIZE);
if (high_table_pointer) {
unsigned long new_high_table_pointer;
new_high_table_pointer = write_smp_table(high_table_pointer);
// FIXME make mp table code intelligent enough to know how
// much space it's going to need.
if (new_high_table_pointer > (high_table_pointer + MAX_MP_TABLE_SIZE)) {
printk(BIOS_ERR, "ERROR: Increase MP table size.\n");
}
printk(BIOS_DEBUG, "MP table: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
}
#endif /* CONFIG_GENERATE_MP_TABLE */
#if CONFIG_GENERATE_ACPI_TABLES == 1
#define MAX_ACPI_SIZE (47 * 1024)
post_code(0x9c);
/* Write ACPI tables to F segment and high tables area */
#if CONFIG_GENERATE_ACPI_TABLES == 1
if (high_tables_base) {
unsigned long acpi_start = high_table_end;
/* Ok, this is a bit hacky still, because some day we want to have this
* completely dynamic. But right now we are setting fixed sizes.
* It's probably still better than the old high_table_base code because
* now at least we know when we have an overflow in the area.
*
* We want to use 1MB - 64K for Resume backup. We use 512B for TOC and
* 512 byte for GDT, 4K for PIRQ and 4K for MP table and 8KB for the
* coreboot table. This leaves us with 47KB for all of ACPI. Let's see
* how far we get.
*/
high_table_pointer = (unsigned long)cbmem_add(CBMEM_ID_ACPI, MAX_ACPI_SIZE);
if (high_table_pointer) {
unsigned long acpi_start = high_table_pointer;
unsigned long new_high_table_pointer;
rom_table_end = ALIGN(rom_table_end, 16);
high_table_end = write_acpi_tables(high_table_end);
while (acpi_start < high_table_end) {
new_high_table_pointer = write_acpi_tables(high_table_pointer);
if (new_high_table_pointer > ( high_table_pointer + MAX_ACPI_SIZE)) {
printk(BIOS_ERR, "ERROR: Increase ACPI size\n");
}
printk(BIOS_DEBUG, "ACPI tables: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
/* Now we need to create a low table copy of the RSDP. */
/* First we look for the high table RSDP */
while (acpi_start < new_high_table_pointer) {
if (memcmp(((acpi_rsdp_t *)acpi_start)->signature, RSDP_SIG, 8) == 0) {
break;
}
acpi_start++;
}
if (acpi_start != high_table_end) {
/* Now, if we found the RSDP, we take the RSDT and XSDT pointer
* from it in order to write the low RSDP
*/
if (acpi_start < new_high_table_pointer) {
acpi_rsdp_t *low_rsdp = (acpi_rsdp_t *)rom_table_end,
*high_rsdp = (acpi_rsdp_t *)acpi_start;
@ -125,65 +173,61 @@ struct lb_memory *write_tables(void)
} else {
printk_err("ERROR: Didn't find RSDP in high table.\n");
}
high_table_end = ALIGN(high_table_end, 1024);
rom_table_end = ALIGN(rom_table_end + sizeof(acpi_rsdp_t), 16);
} else {
rom_table_end = write_acpi_tables(rom_table_end);
rom_table_end = ALIGN(rom_table_end, 1024);
}
#endif
post_code(0x9b);
#if CONFIG_GENERATE_MP_TABLE == 1
/* The smp table must be in 0-1K, 639K-640K, or 960K-1M */
rom_table_end = write_smp_table(rom_table_end);
rom_table_end = ALIGN(rom_table_end, 1024);
/* ... and a copy in the high tables */
if (high_tables_base) {
high_table_end = write_smp_table(high_table_end);
high_table_end = ALIGN(high_table_end, 1024);
}
#endif /* CONFIG_GENERATE_MP_TABLE */
post_code(0x9c);
// Relocate the GDT to reserved memory, so it won't get clobbered
if (high_tables_base) {
move_gdt(high_table_end);
high_table_end += &gdt_end - &gdt;
high_table_end = ALIGN(high_table_end, 1024);
} else {
move_gdt(low_table_end);
low_table_end += &gdt_end - &gdt;
}
post_code(0x9d);
#if CONFIG_MULTIBOOT
post_code(0x9d);
/* The Multiboot information structure */
rom_table_end = write_multiboot_info(
low_table_start, low_table_end,
rom_table_start, rom_table_end);
#endif
post_code(0x9e);
#define MAX_COREBOOT_TABLE_SIZE (8 * 1024)
post_code(0x9d);
high_table_pointer = cbmem_add(CBMEM_ID_CBTABLE, MAX_COREBOOT_TABLE_SIZE);
if (high_table_pointer) {
unsigned long new_high_table_pointer;
if (high_tables_base) {
/* Also put a forwarder entry into 0-4K */
write_coreboot_table(low_table_start, low_table_end,
high_tables_base, high_table_end);
if (high_table_end > high_tables_base + high_tables_size)
printk_err("%s: High tables didn't fit in %llx (%llx)\n",
__func__, high_tables_size, high_table_end -
high_tables_base);
new_high_table_pointer = write_coreboot_table(low_table_start, low_table_end,
high_tables_base, high_table_pointer);
if (new_high_table_pointer > (high_table_pointer +
MAX_COREBOOT_TABLE_SIZE))
printk_err("%s: coreboot table didn't fit (%llx)\n",
__func__, new_high_table_pointer -
high_table_pointer);
printk(BIOS_DEBUG, "coreboot table: %ld bytes.\n",
new_high_table_pointer - high_table_pointer);
} else {
/* The coreboot table must be in 0-4K or 960K-1M */
write_coreboot_table(low_table_start, low_table_end,
rom_table_start, rom_table_end);
}
post_code(0x9f);
post_code(0x9e);
#if CONFIG_HAVE_ACPI_RESUME
/* Let's prepare the ACPI S3 Resume area now already, so we can rely on
* it begin there during reboot time. We don't need the pointer, nor
* the result right now. If it fails, ACPI resume will be disabled.
*/
cbmem_add(CBMEM_ID_RESUME, 1024 * (1024-64));
#endif
// Remove before sending upstream
cbmem_list();
return get_lb_mem();
}

13
src/boot/hardwaremain.c
View File

@ -39,12 +39,14 @@ it with the version available from LANL.
#if CONFIG_HAVE_ACPI_RESUME
#include <arch/acpi.h>
#endif
#if CONFIG_WRITE_HIGH_TABLES
#include <cbmem.h>
#endif
/**
* @brief Main function of the DRAM part of coreboot.
*
* Coreboot is divided into Pre-DRAM part and DRAM part.
* @brief Main function of the RAM part of coreboot.
*
* Coreboot is divided into Pre-RAM part and RAM part.
*
* Device Enumeration:
* In the dev_enumerate() phase,
@ -56,7 +58,7 @@ void hardwaremain(int boot_complete)
post_code(0x80);
/* displayinit MUST PRECEDE ALL PRINTK! */
/* console_init() MUST PRECEDE ALL printk()! */
console_init();
post_code(0x39);
@ -87,6 +89,9 @@ void hardwaremain(int boot_complete)
dev_initialize();
post_code(0x89);
#if CONFIG_WRITE_HIGH_TABLES == 1
cbmem_initialize();
#endif
#if CONFIG_HAVE_ACPI_RESUME == 1
suspend_resume();
post_code(0x8a);

60
src/cpu/intel/model_6ex/cache_as_ram_disable.c
View File

@ -1,7 +1,7 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2008 coresystems GmbH
* Copyright (C) 2007-2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@ -53,24 +53,20 @@ void stage1_main(unsigned long bist)
/* No servicable parts below this line .. */
{
/* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
unsigned v_esp;
__asm__ volatile (
"movl %%esp, %0\n\t"
: "=a" (v_esp)
);
printk_spew("v_esp=%08x\r\n", v_esp);
}
#if CAR_DEBUG
/* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
unsigned v_esp;
__asm__ volatile (
"movl %%esp, %0\n"
: "=a" (v_esp)
);
printk_spew("v_esp=%08x\n", v_esp);
#endif
cpu_reset_x:
printk_spew("cpu_reset = %08x\r\n",cpu_reset);
if(cpu_reset == 0) {
print_spew("Clearing initial memory region: ");
}
print_spew("No cache as ram now - ");
printk_spew("cpu_reset = %08x\n", cpu_reset);
printk_spew("No cache as ram now - ");
/* store cpu_reset to ebx */
__asm__ volatile (
@ -78,19 +74,22 @@ cpu_reset_x:
::"a" (cpu_reset)
);
if(cpu_reset==0) {
#define CLEAR_FIRST_1M_RAM 1
#include "cache_as_ram_post.c"
} else {
#undef CLEAR_FIRST_1M_RAM
#include "cache_as_ram_post.c"
}
/* For now: use rambase + 1MB - 64K (counting downwards) as stack. This
* makes sure that we stay completely within the 1M of memory we
* preserve with the memcpy above.
*/
#ifndef HIGH_MEMORY_SAVE
#define HIGH_MEMORY_SAVE ( (1024 - 64) * 1024 )
#endif
__asm__ volatile (
/* set new esp */ /* before CONFIG_RAMBASE */
"subl %0, %%ebp\n\t"
"subl %0, %%esp\n\t"
::"a"( (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)- CONFIG_RAMBASE )
"movl %0, %%ebp\n"
"movl %0, %%esp\n"
:: "a" (CONFIG_RAMBASE + HIGH_MEMORY_SAVE)
);
{
@ -98,19 +97,14 @@ cpu_reset_x:
/* get back cpu_reset from ebx */
__asm__ volatile (
"movl %%ebx, %0\n\t"
"movl %%ebx, %0\n"
:"=a" (new_cpu_reset)
);
#ifdef DEACTIVATE_CAR
print_debug("Deactivating CAR");
#include DEACTIVATE_CAR_FILE
print_debug(" - Done.\r\n");
#endif
/* Copy and execute coreboot_ram */
copy_and_run(new_cpu_reset);
/* We will not return */
}
print_debug("sorry. parachute did not open.\r\n");
/* We will not return */
printk_debug("sorry. parachute did not open.\n");
}

60
src/cpu/intel/model_6fx/cache_as_ram_disable.c
View File

@ -1,7 +1,7 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2007-2008 coresystems GmbH
* Copyright (C) 2007-2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
@ -53,24 +53,20 @@ void stage1_main(unsigned long bist)
/* No servicable parts below this line .. */
{
/* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
unsigned v_esp;
__asm__ volatile (
"movl %%esp, %0\n\t"
: "=a" (v_esp)
);
printk_spew("v_esp=%08x\r\n", v_esp);
}
#if CAR_DEBUG
/* Check value of esp to verify if we have enough rom for stack in Cache as RAM */
unsigned v_esp;
__asm__ volatile (
"movl %%esp, %0\n"
: "=a" (v_esp)
);
printk_spew("v_esp=%08x\n", v_esp);
#endif
cpu_reset_x:
printk_spew("cpu_reset = %08x\r\n",cpu_reset);
if(cpu_reset == 0) {
print_spew("Clearing initial memory region: ");
}
print_spew("No cache as ram now - ");
printk_spew("cpu_reset = %08x\n", cpu_reset);
printk_spew("No cache as ram now - ");
/* store cpu_reset to ebx */
__asm__ volatile (
@ -78,19 +74,22 @@ cpu_reset_x:
::"a" (cpu_reset)
);
if(cpu_reset==0) {
#define CLEAR_FIRST_1M_RAM 1
#include "cache_as_ram_post.c"
} else {
#undef CLEAR_FIRST_1M_RAM
#include "cache_as_ram_post.c"
}
/* For now: use rambase + 1MB - 64K (counting downwards) as stack. This
* makes sure that we stay completely within the 1M of memory we
* preserve with the memcpy above.
*/
#ifndef HIGH_MEMORY_SAVE
#define HIGH_MEMORY_SAVE ( (1024 - 64) * 1024 )
#endif
__asm__ volatile (
/* set new esp */ /* before CONFIG_RAMBASE */
"subl %0, %%ebp\n\t"
"subl %0, %%esp\n\t"
::"a"( (CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE)- CONFIG_RAMBASE )
"movl %0, %%ebp\n"
"movl %0, %%esp\n"
:: "a" (CONFIG_RAMBASE + HIGH_MEMORY_SAVE)
);
{
@ -98,19 +97,14 @@ cpu_reset_x:
/* get back cpu_reset from ebx */
__asm__ volatile (
"movl %%ebx, %0\n\t"
"movl %%ebx, %0\n"
:"=a" (new_cpu_reset)
);
#ifdef DEACTIVATE_CAR
print_debug("Deactivating CAR");
#include DEACTIVATE_CAR_FILE
print_debug(" - Done.\r\n");
#endif
/* Copy and execute coreboot_ram */
copy_and_run(new_cpu_reset);
/* We will not return */
}
print_debug("sorry. parachute did not open.\r\n");
/* We will not return */
printk_debug("sorry. parachute did not open.\n");
}

49
src/include/cbmem.h Normal file
View File

@ -0,0 +1,49 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#ifndef _CBMEM_H_
#define _CBMEM_H_
/* Reserve 64k for ACPI and other tables */
#define HIGH_MEMORY_TABLES ( 64 * 1024 )
#if CONFIG_HAVE_ACPI_RESUME
#define HIGH_MEMORY_SIZE ( 1024 * 1024 )
#define HIGH_MEMORY_SAVE ( HIGH_MEMORY_SIZE - HIGH_MEMORY_TABLES )
#else
#define HIGH_MEMORY_SIZE HIGH_MEMORY_TABLES
#endif
#define CBMEM_ID_FREESPACE 0x46524545
#define CBMEM_ID_GDT 0x4c474454
#define CBMEM_ID_ACPI 0x41435049
#define CBMEM_ID_CBTABLE 0x43425442
#define CBMEM_ID_PIRQ 0x49525154
#define CBMEM_ID_MPTABLE 0x534d5054
#define CBMEM_ID_RESUME 0x5245534d
#define CBMEM_ID_NONE 0x00000000
void cbmem_initialize(void);
void cbmem_init(u64 baseaddr, u64 size);
int cbmem_reinit(u64 baseaddr);
void *cbmem_add(u32 id, u64 size);
void *cbmem_find(u32 id);
#endif

6
src/lib/Config.lb
View File

@ -18,6 +18,9 @@ object fallback_boot.o
object compute_ip_checksum.o
object version.o
object gcc.o
object cbfs.o
object lzma.o
object cbmem.o
# Force version.o to recompile every time
makedefine .PHONY : version.o
@ -27,5 +30,4 @@ initobject memset.o
initobject memcpy.o
initobject memcmp.o
object cbfs.o
object lzma.o

1
src/lib/Makefile.inc
View File

@ -13,6 +13,7 @@ obj-y += cbfs.o
obj-y += lzma.o
#obj-y += lzmadecode.o
obj-y += gcc.o
obj-y += cbmem.o
initobj-y += uart8250.o
initobj-y += memset.o

239
src/lib/cbmem.c Normal file
View File

@ -0,0 +1,239 @@
/*
* This file is part of the coreboot project.
*
* Copyright (C) 2009 coresystems GmbH
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
*/
#include <types.h>
#include <string.h>
#include <cbmem.h>
#include <console/console.h>
#if 1
#define debug(x...) printk_debug(x)
#else
#define debug(x...)
#endif
// The CBMEM TOC reserves 512 bytes to keep
// the other entries somewhat aligned.
// Increase if MAX_CBMEM_ENTRIES exceeds 21
#define CBMEM_TOC_RESERVED 512
#define MAX_CBMEM_ENTRIES 16
#define CBMEM_MAGIC 0x434f5245
static void *cbmem_base;
static int cbmem_size;
struct cbmem_entry {
u32 magic;
u32 id;
u64 base;
u64 size;
} __attribute__((packed));
#ifndef __ROMCC__
struct cbmem_entry *bss_cbmem_toc;
#endif
/**
* cbmem is a simple mechanism to do some kind of book keeping of the coreboot
* high tables memory. This is a small amount of memory which is "stolen" from
* the system memory for coreboot purposes. Usually this memory is used for
* - the coreboot table
* - legacy tables (PIRQ, MP table)
* - ACPI tables
* - suspend/resume backup memory
*/
void cbmem_init(u64 baseaddr, u64 size)
{
struct cbmem_entry *cbmem_toc;
cbmem_toc = (struct cbmem_entry *)(unsigned long)baseaddr;
#ifndef __ROMCC__
bss_cbmem_toc = cbmem_toc;
#endif
debug("Initializing CBMEM area to 0x%llx (%lld bytes)\n", baseaddr, size);
if (size < (64 * 1024)) {
debug("Increase CBMEM size!!\n");
for (;;) ;
}
memset(cbmem_toc, 0, CBMEM_TOC_RESERVED);
cbmem_toc[0] = (struct cbmem_entry) {
.magic = CBMEM_MAGIC,
.id = CBMEM_ID_FREESPACE,
.base = baseaddr + CBMEM_TOC_RESERVED,
.size = size - CBMEM_TOC_RESERVED
};
}
int cbmem_reinit(u64 baseaddr)
{
struct cbmem_entry *cbmem_toc;
cbmem_toc = (struct cbmem_entry *)(unsigned long)baseaddr;
debug("Re-Initializing CBMEM area to 0x%lx\n", baseaddr);
#ifndef __ROMCC__
bss_cbmem_toc = cbmem_toc;
#endif
return (cbmem_toc[0].magic == CBMEM_MAGIC);
}
void *cbmem_add(u32 id, u64 size)
{
struct cbmem_entry *cbmem_toc;
int i;
#ifdef __ROMCC__
cbmem_toc = (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE);
#else
cbmem_toc = bss_cbmem_toc;
#endif
if (cbmem_toc == NULL) {
return NULL;
}
if (cbmem_toc[0].magic != CBMEM_MAGIC) {
printk_err("ERROR: CBMEM was not initialized yet.\n");
return NULL;
}
/* Will the entry fit at all? */
if (size > cbmem_toc[0].size) {
printk_err("ERROR: Not enough memory for table %x\n", id);
return NULL;
}
/* Align size to 512 byte blocks */
size = ALIGN(size, 512) < cbmem_toc[0].size ?
ALIGN(size, 512) : cbmem_toc[0].size;
/* Now look for the first free/usable TOC entry */
for (i = 0; i < MAX_CBMEM_ENTRIES; i++) {
if (cbmem_toc[i].id == CBMEM_ID_NONE)
break;
}
if (i >= MAX_CBMEM_ENTRIES) {
printk_err("ERROR: No more CBMEM entries available.\n");
return NULL;
}
debug("Adding CBMEM entry as no. %d\n", i);
cbmem_toc[i] = (struct cbmem_entry) {
.magic = CBMEM_MAGIC,
.id = id,
.base = cbmem_toc[0].base,
.size = size
};
cbmem_toc[0].base += size;
cbmem_toc[0].size -= size;
return (void *)cbmem_toc[i].base;
}
void *cbmem_find(u32 id)
{
struct cbmem_entry *cbmem_toc;
int i;
#ifdef __ROMCC__
cbmem_toc = (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE);
#else
cbmem_toc = bss_cbmem_toc;
#endif
if (cbmem_toc == NULL)
return NULL;
for (i = 0; i < MAX_CBMEM_ENTRIES; i++) {
if (cbmem_toc[i].id == id)
return (void *)(unsigned long)cbmem_toc[i].base;
}
return (void *)NULL;
}
#ifndef __ROMCC__
void cbmem_arch_init(void);
#if CONFIG_HAVE_ACPI_RESUME
extern u8 acpi_slp_type;
#endif
extern uint64_t high_tables_base, high_tables_size;
void cbmem_initialize(void)
{
#if CONFIG_HAVE_ACPI_RESUME
if (acpi_slp_type == 3) {
if (!cbmem_reinit(high_tables_base)) {
/* Something went wrong, our high memory area got wiped */
acpi_slp_type == 0;
cbmem_init(high_tables_base, high_tables_size);
}
} else {
cbmem_init(high_tables_base, high_tables_size);
}
#else
cbmem_init(high_tables_base, high_tables_size);
#endif
cbmem_arch_init();
}
#ifndef __ROMCC__
void cbmem_list(void)
{
struct cbmem_entry *cbmem_toc;
int i;
#ifdef __ROMCC__
cbmem_toc = (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE);
#else
cbmem_toc = bss_cbmem_toc;
#endif
if (cbmem_toc == NULL)
return NULL;
for (i = 0; i < MAX_CBMEM_ENTRIES; i++) {
if (cbmem_toc[i].magic != CBMEM_MAGIC)
continue;
printk_debug("%2d. ", i);
switch (cbmem_toc[i].id) {
case CBMEM_ID_FREESPACE: printk_debug("FREE SPACE "); break;
case CBMEM_ID_GDT: printk_debug("GDT "); break;
case CBMEM_ID_ACPI: printk_debug("ACPI "); break;
case CBMEM_ID_CBTABLE: printk_debug("COREBOOT "); break;
case CBMEM_ID_PIRQ: printk_debug("IRQ TABLE "); break;
case CBMEM_ID_MPTABLE: printk_debug("SMP TABLE "); break;
case CBMEM_ID_RESUME: printk_debug("ACPI RESUME"); break;
default: printk_debug("%08x ", cbmem_toc[i].id);
}
printk_debug("%08llx ", cbmem_toc[i].base);
printk_debug("%08llx\n", cbmem_toc[i].size);
}
}
#endif
#endif