diff options
Diffstat (limited to 'arch/mips/loongson32/common/prom.c')
| -rw-r--r-- | arch/mips/loongson32/common/prom.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/mips/loongson32/common/prom.c b/arch/mips/loongson32/common/prom.c new file mode 100644 index 000000000..fc580a227 --- /dev/null +++ b/arch/mips/loongson32/common/prom.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com> + * + * Modified from arch/mips/pnx833x/common/prom.c. + */ + +#include <linux/io.h> +#include <linux/init.h> +#include <linux/memblock.h> +#include <linux/serial_reg.h> +#include <asm/fw/fw.h> + +#include <loongson1.h> + +unsigned long memsize; + +void __init prom_init(void) +{ + void __iomem *uart_base; + + fw_init_cmdline(); + + memsize = fw_getenvl("memsize"); + if(!memsize) + memsize = DEFAULT_MEMSIZE; + + if (strstr(arcs_cmdline, "console=ttyS3")) + uart_base = ioremap(LS1X_UART3_BASE, 0x0f); + else if (strstr(arcs_cmdline, "console=ttyS2")) + uart_base = ioremap(LS1X_UART2_BASE, 0x0f); + else if (strstr(arcs_cmdline, "console=ttyS1")) + uart_base = ioremap(LS1X_UART1_BASE, 0x0f); + else + uart_base = ioremap(LS1X_UART0_BASE, 0x0f); + setup_8250_early_printk_port((unsigned long)uart_base, 0, 0); +} + +void __init plat_mem_setup(void) +{ + memblock_add(0x0, (memsize << 20)); +} |