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/*
* This file is part of the coreboot project.
*
* Copyright (C) 2014 Google Inc
*
* 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.
*/
#include <stddef.h>
#include <stdint.h>
#include <boot/coreboot_tables.h>
#include <bootstate.h>
#include <console/console.h>
#include <cbmem.h>
#include <device/device.h>
#include "chromeos.h"
#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
static void set_ramoops(chromeos_acpi_t *chromeos, void *ram_oops, size_t size)
{
if (chromeos == NULL) {
printk(BIOS_DEBUG, "chromeos gnvs is NULL. ramoops not set.\n");
return;
}
printk(BIOS_DEBUG, "Ramoops buffer: 0x%zx@0x%p.\n", size, ram_oops);
chromeos->ramoops_base = (uintptr_t)ram_oops;
chromeos->ramoops_len = size;
}
static void reserve_ram_oops_dynamic(chromeos_acpi_t *chromeos)
{
const size_t size = CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE;
void *ram_oops;
if (!IS_ENABLED(CONFIG_CHROMEOS_RAMOOPS_DYNAMIC))
return;
ram_oops = cbmem_add(CBMEM_ID_RAM_OOPS, size);
set_ramoops(chromeos, ram_oops, size);
}
#if CONFIG_CHROMEOS_RAMOOPS_DYNAMIC
static inline void set_global_chromeos_pointer(chromeos_acpi_t *chromeos) {}
#else /* !CONFIG_CHROMEOS_RAMOOPS_DYNAMIC */
static const unsigned long ramoops_base = CONFIG_CHROMEOS_RAMOOPS_RAM_START;
static const unsigned long ramoops_size = CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE;
/*
* Save pointer to chromeos structure in memory. This is needed because the
* memory reservation is not done when chromeos_init() is called. However,
* the pointer to the chromeos_acpi_t structure is needed to update the
* fields with the rserved base and size.
*/
static chromeos_acpi_t *g_chromeos;
static void set_global_chromeos_pointer(chromeos_acpi_t *chromeos)
{
g_chromeos = chromeos;
}
static void update_gnvs(void *arg)
{
chromeos_acpi_t **chromeos = arg;
set_ramoops(*chromeos, (void *)ramoops_base, ramoops_size);
}
static BOOT_STATE_CALLBACK(bscb_ramoops, update_gnvs, &g_chromeos);
void chromeos_reserve_ram_oops(struct device *dev, int idx)
{
const unsigned long base = ramoops_base >> 10;
const unsigned long size = ramoops_size >> 10;
reserved_ram_resource(dev, idx, base, size);
boot_state_sched_on_exit(&bscb_ramoops, BS_WRITE_TABLES);
}
#endif /* CONFIG_CHROMEOS_RAMOOPS_DYNAMIC */
void chromeos_ram_oops_init(chromeos_acpi_t *chromeos)
{
set_global_chromeos_pointer(chromeos);
reserve_ram_oops_dynamic(chromeos);
}
#elif IS_ENABLED(CONFIG_CHROMEOS_RAMOOPS_NON_ACPI)
static void ramoops_alloc(void *arg)
{
const size_t size = CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE;
if (size == 0)
return;
if (cbmem_add(CBMEM_ID_RAM_OOPS, size) == NULL)
printk(BIOS_ERR, "Could not allocate RAMOOPS buffer\n");
}
BOOT_STATE_INIT_ENTRY(BS_WRITE_TABLES, BS_ON_ENTRY, ramoops_alloc, NULL);
#endif
void lb_ramoops(struct lb_header *header)
{
void *buffer = cbmem_find(CBMEM_ID_RAM_OOPS);
if (buffer == NULL)
return;
struct lb_range *ramoops;
ramoops = (struct lb_range *)lb_new_record(header);
ramoops->tag = LB_TAG_RAM_OOPS;
ramoops->size = sizeof(*ramoops);
ramoops->range_start = (uintptr_t)buffer;
ramoops->range_size = CONFIG_CHROMEOS_RAMOOPS_RAM_SIZE;
}
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