static int __init ram_console_early_init(void)
{
struct ram_console_buffer *bufp = NULL;
size_t buffer_size = 0;
#if defined(CONFIG_MTK_RAM_CONSOLE_USING_SRAM)
#ifdef CONFIG_OF
mem_desc_t sram = {0};
if (of_scan_flat_dt(dt_get_ram_console, &sram)) {
if (sram.start == 0) {
sram.start = CONFIG_MTK_RAM_CONSOLE_ADDR;
sram.size = CONFIG_MTK_RAM_CONSOLE_SIZE;
}
bufp = ioremap(sram.start, sram.size);
ram_console_buffer_pa = sram.start;
if (bufp)
buffer_size = sram.size;
else {
pr_err("ram_console: ioremap failed, [0x%x, 0x%x]\n", sram.start, sram.size);
return 0;
}
/*check if pl/lk use dram*/
struct ram_console_buffer *bufp_dram = NULL;
bufp_dram = remap_lowmem(CONFIG_MTK_RAM_CONSOLE_DRAM_ADDR, CONFIG_MTK_RAM_CONSOLE_DRAM_SIZE);
if (bufp_dram->sig == REBOOT_REASON_SIG) {
pr_err("ram_console: kernel use sram, but pl/lk use dram.\n");
memcpy(bufp, bufp_dram, sizeof(struct ram_console_buffer));
bufp_dram->sig = 0;
}
} else {
return 0;
}
#else
bufp = (struct ram_console_buffer *)CONFIG_MTK_RAM_CONSOLE_ADDR;
buffer_size = CONFIG_MTK_RAM_CONSOLE_SIZE;
/*check if pl/lk use dram*/
struct ram_console_buffer *bufp_dram = NULL;
bufp_dram = remap_lowmem(CONFIG_MTK_RAM_CONSOLE_DRAM_ADDR, CONFIG_MTK_RAM_CONSOLE_DRAM_SIZE);
if (bufp_dram->sig == REBOOT_REASON_SIG) {
pr_err("ram_console: kernel use sram, but pl/lk use dram.\n");
memcpy(bufp, bufp_dram, sizeof(struct ram_console_buffer));
bufp_dram->sig = 0;
}
#endif
#elif defined(CONFIG_MTK_RAM_CONSOLE_USING_DRAM)
bufp = remap_lowmem(CONFIG_MTK_RAM_CONSOLE_DRAM_ADDR, CONFIG_MTK_RAM_CONSOLE_DRAM_SIZE);
ram_console_buffer_pa = CONFIG_MTK_RAM_CONSOLE_DRAM_ADDR;
if (bufp == NULL) {
pr_err("ram_console: ioremap failed\n");
return 0;
}
buffer_size = CONFIG_MTK_RAM_CONSOLE_DRAM_SIZE;
#else
return 0;
#endif
pr_err("ram_console: buffer start: 0x%p, size: 0x%zx\n", bufp, buffer_size);
mtk_cpu_num = num_present_cpus();
return ram_console_init(bufp, buffer_size);
}
static int __init ram_console_early_init(void)
{
struct ram_console_buffer *bufp = NULL;
size_t buffer_size = 0;
#if defined(CONFIG_MTK_RAM_CONSOLE_USING_SRAM)
bufp = (struct ram_console_buffer *)CONFIG_MTK_RAM_CONSOLE_ADDR;
buffer_size = CONFIG_MTK_RAM_CONSOLE_SIZE;
#elif defined(CONFIG_MTK_RAM_CONSOLE_USING_DRAM)
bufp = remap_lowmem(CONFIG_MTK_RAM_CONSOLE_DRAM_ADDR, CONFIG_MTK_RAM_CONSOLE_DRAM_SIZE);
if (bufp == NULL) {
pr_err("ioremap failed, no ram console available\n");
return 0;
}
buffer_size = CONFIG_MTK_RAM_CONSOLE_DRAM_SIZE;
#else
return 0;
#endif
pr_err("%s: start: 0x%p, size: %d\n", __func__, bufp, buffer_size);
mtk_cpu_num = num_present_cpus();
return ram_console_init(bufp, buffer_size);
}
