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/* Copyright (c) 2012-2014, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* 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.
*/
#include <asm/cacheflush.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/init.h>
#include <linux/export.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <soc/qcom/memory_dump.h>
#define MSM_DUMP_TABLE_VERSION MSM_DUMP_MAKE_VERSION(1, 0)
struct msm_dump_table {
u32 version;
u32 num_entries;
struct msm_client_dump client_entries[MAX_NUM_CLIENTS];
};
struct msm_memory_dump {
unsigned long dump_table_phys;
struct msm_dump_table *dump_table_ptr;
};
static struct msm_memory_dump mem_dump_data;
uint32_t msm_dump_table_version(void)
{
return MSM_DUMP_TABLE_VERSION;
}
EXPORT_SYMBOL(msm_dump_table_version);
int msm_dump_tbl_register(struct msm_client_dump *client_entry)
{
struct msm_client_dump *entry;
struct msm_dump_table *table = mem_dump_data.dump_table_ptr;
if (!table || table->num_entries >= MAX_NUM_CLIENTS)
return -EINVAL;
entry = &table->client_entries[table->num_entries];
entry->id = client_entry->id;
entry->start_addr = client_entry->start_addr;
entry->end_addr = client_entry->end_addr;
table->num_entries++;
/* flush cache */
dmac_flush_range(table, (void *)table + sizeof(struct msm_dump_table));
return 0;
}
EXPORT_SYMBOL(msm_dump_tbl_register);
static int __init init_memory_dump(void)
{
struct msm_dump_table *table;
struct device_node *np;
static void __iomem *imem_base;
np = of_find_compatible_node(NULL, NULL, "qcom,msm-imem-mem_dump_table");
if (!np) {
pr_err("unable to find DT imem dump table node\n");
return -ENODEV;
}
imem_base = of_iomap(np, 0);
if (!imem_base) {
pr_err("unable to map imem dump table offset\n");
return -ENOMEM;
}
mem_dump_data.dump_table_ptr = kzalloc(sizeof(struct msm_dump_table),
GFP_KERNEL);
if (!mem_dump_data.dump_table_ptr) {
iounmap(imem_base);
printk(KERN_ERR "unable to allocate memory for dump table\n");
return -ENOMEM;
}
table = mem_dump_data.dump_table_ptr;
table->version = MSM_DUMP_TABLE_VERSION;
mem_dump_data.dump_table_phys = virt_to_phys(table);
writel_relaxed(mem_dump_data.dump_table_phys, imem_base);
printk(KERN_INFO "MSM Memory Dump table set up\n");
iounmap(imem_base);
return 0;
}
early_initcall(init_memory_dump);
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