271 lines
6.9 KiB
C
271 lines
6.9 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2009 coresystems GmbH
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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*/
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#include <types.h>
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#include <string.h>
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#include <cbmem.h>
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#include <console/console.h>
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#if CONFIG_HAVE_ACPI_RESUME && !defined(__PRE_RAM__)
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#include <arch/acpi.h>
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#endif
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// The CBMEM TOC reserves 512 bytes to keep
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// the other entries somewhat aligned.
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// Increase if MAX_CBMEM_ENTRIES exceeds 21
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#define CBMEM_TOC_RESERVED 512
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#define MAX_CBMEM_ENTRIES 16
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#define CBMEM_MAGIC 0x434f5245
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struct cbmem_entry {
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u32 magic;
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u32 id;
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u64 base;
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u64 size;
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} __attribute__((packed));
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#ifndef __PRE_RAM__
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static struct cbmem_entry *bss_cbmem_toc;
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struct cbmem_entry *__attribute__((weak)) get_cbmem_toc(void)
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{
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return bss_cbmem_toc;
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}
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void __attribute__((weak)) set_cbmem_toc(struct cbmem_entry * x)
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{
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/* do nothing, this should be called by chipset to save TOC in NVRAM */
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}
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#else
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struct cbmem_entry *__attribute__((weak)) get_cbmem_toc(void)
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{
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printk(BIOS_WARNING, "WARNING: you need to define get_cbmem_toc() for your chipset\n");
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return NULL;
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}
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#endif
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/**
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* cbmem is a simple mechanism to do some kind of book keeping of the coreboot
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* high tables memory. This is a small amount of memory which is "stolen" from
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* the system memory for coreboot purposes. Usually this memory is used for
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* - the coreboot table
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* - legacy tables (PIRQ, MP table)
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* - ACPI tables
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* - suspend/resume backup memory
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*/
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void cbmem_init(u64 baseaddr, u64 size)
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{
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struct cbmem_entry *cbmem_toc;
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cbmem_toc = (struct cbmem_entry *)(unsigned long)baseaddr;
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#ifndef __PRE_RAM__
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bss_cbmem_toc = cbmem_toc;
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#endif
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printk(BIOS_DEBUG, "Initializing CBMEM area to 0x%llx (%lld bytes)\n",
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baseaddr, size);
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if (size < (64 * 1024)) {
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printk(BIOS_DEBUG, "Increase CBMEM size!\n");
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for (;;) ;
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}
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/* we don't need to call this in romstage, usefull only from ramstage */
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#ifndef __PRE_RAM__
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set_cbmem_toc((struct cbmem_entry *)(unsigned long)baseaddr);
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#endif
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memset(cbmem_toc, 0, CBMEM_TOC_RESERVED);
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cbmem_toc[0] = (struct cbmem_entry) {
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.magic = CBMEM_MAGIC,
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.id = CBMEM_ID_FREESPACE,
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.base = baseaddr + CBMEM_TOC_RESERVED,
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.size = size - CBMEM_TOC_RESERVED
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};
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}
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int cbmem_reinit(u64 baseaddr)
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{
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struct cbmem_entry *cbmem_toc;
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cbmem_toc = (struct cbmem_entry *)(unsigned long)baseaddr;
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printk(BIOS_DEBUG, "Re-Initializing CBMEM area to 0x%lx\n",
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(unsigned long)baseaddr);
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#ifndef __PRE_RAM__
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bss_cbmem_toc = cbmem_toc;
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#endif
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return (cbmem_toc[0].magic == CBMEM_MAGIC);
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}
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void *cbmem_add(u32 id, u64 size)
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{
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struct cbmem_entry *cbmem_toc;
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int i;
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void *p;
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/*
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* This could be a restart, check if the section is there already. It
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* is remotely possible that the dram contents persisted over the
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* bootloader upgrade AND the same section now needs more room, but
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* this is quite a remote possibility and it is ignored here.
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*/
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p = cbmem_find(id);
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if (p) {
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printk(BIOS_NOTICE,
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"CBMEM section %x: using existing location at %p.\n",
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id, p);
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return p;
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}
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cbmem_toc = get_cbmem_toc();
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if (cbmem_toc == NULL) {
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return NULL;
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}
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if (cbmem_toc[0].magic != CBMEM_MAGIC) {
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printk(BIOS_ERR, "ERROR: CBMEM was not initialized yet.\n");
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return NULL;
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}
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/* Will the entry fit at all? */
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if (size > cbmem_toc[0].size) {
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printk(BIOS_ERR, "ERROR: Not enough memory for table %x\n", id);
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return NULL;
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}
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/* Align size to 512 byte blocks */
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size = ALIGN(size, 512) < cbmem_toc[0].size ?
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ALIGN(size, 512) : cbmem_toc[0].size;
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/* Now look for the first free/usable TOC entry */
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for (i = 0; i < MAX_CBMEM_ENTRIES; i++) {
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if (cbmem_toc[i].id == CBMEM_ID_NONE)
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break;
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}
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if (i >= MAX_CBMEM_ENTRIES) {
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printk(BIOS_ERR, "ERROR: No more CBMEM entries available.\n");
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return NULL;
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}
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printk(BIOS_DEBUG, "Adding CBMEM entry as no. %d\n", i);
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cbmem_toc[i] = (struct cbmem_entry) {
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.magic = CBMEM_MAGIC,
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.id = id,
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.base = cbmem_toc[0].base,
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.size = size
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};
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cbmem_toc[0].base += size;
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cbmem_toc[0].size -= size;
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return (void *)(u32)cbmem_toc[i].base;
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}
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void *cbmem_find(u32 id)
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{
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struct cbmem_entry *cbmem_toc;
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int i;
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cbmem_toc = get_cbmem_toc();
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if (cbmem_toc == NULL)
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return NULL;
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for (i = 0; i < MAX_CBMEM_ENTRIES; i++) {
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if (cbmem_toc[i].id == id)
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return (void *)(unsigned long)cbmem_toc[i].base;
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}
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return (void *)NULL;
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}
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#if CONFIG_EARLY_CBMEM_INIT || !defined(__PRE_RAM__)
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/* Returns True if it was not intialized before. */
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int cbmem_initialize(void)
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{
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int rv = 0;
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#ifdef __PRE_RAM__
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extern unsigned long get_top_of_ram(void);
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uint64_t high_tables_base = get_top_of_ram() - HIGH_MEMORY_SIZE;
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uint64_t high_tables_size = HIGH_MEMORY_SIZE;
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#endif
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/* We expect the romstage to always initialize it. */
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if (!cbmem_reinit(high_tables_base)) {
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#if CONFIG_HAVE_ACPI_RESUME && !defined(__PRE_RAM__)
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/* Something went wrong, our high memory area got wiped */
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if (acpi_slp_type == 3 || acpi_slp_type == 2)
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acpi_slp_type = 0;
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#endif
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cbmem_init(high_tables_base, high_tables_size);
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rv = 1;
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}
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#ifndef __PRE_RAM__
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cbmem_arch_init();
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#endif
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return rv;
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}
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#endif
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#ifndef __PRE_RAM__
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void cbmem_list(void)
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{
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struct cbmem_entry *cbmem_toc;
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int i;
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cbmem_toc = get_cbmem_toc();
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if (cbmem_toc == NULL)
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return;
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for (i = 0; i < MAX_CBMEM_ENTRIES; i++) {
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if (cbmem_toc[i].magic != CBMEM_MAGIC)
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continue;
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printk(BIOS_DEBUG, "%2d. ", i);
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switch (cbmem_toc[i].id) {
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case CBMEM_ID_FREESPACE: printk(BIOS_DEBUG, "FREE SPACE "); break;
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case CBMEM_ID_GDT: printk(BIOS_DEBUG, "GDT "); break;
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case CBMEM_ID_ACPI: printk(BIOS_DEBUG, "ACPI "); break;
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case CBMEM_ID_CBTABLE: printk(BIOS_DEBUG, "COREBOOT "); break;
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case CBMEM_ID_PIRQ: printk(BIOS_DEBUG, "IRQ TABLE "); break;
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case CBMEM_ID_MPTABLE: printk(BIOS_DEBUG, "SMP TABLE "); break;
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case CBMEM_ID_RESUME: printk(BIOS_DEBUG, "ACPI RESUME"); break;
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case CBMEM_ID_RESUME_SCRATCH: printk(BIOS_DEBUG, "ACPISCRATCH"); break;
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case CBMEM_ID_SMBIOS: printk(BIOS_DEBUG, "SMBIOS "); break;
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case CBMEM_ID_TIMESTAMP: printk(BIOS_DEBUG, "TIME STAMP "); break;
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case CBMEM_ID_MRCDATA: printk(BIOS_DEBUG, "MRC DATA "); break;
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case CBMEM_ID_CONSOLE: printk(BIOS_DEBUG, "CONSOLE "); break;
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default: printk(BIOS_DEBUG, "%08x ", cbmem_toc[i].id);
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}
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printk(BIOS_DEBUG, "%08llx ", cbmem_toc[i].base);
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printk(BIOS_DEBUG, "%08llx\n", cbmem_toc[i].size);
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}
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}
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#endif
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