diff options
Diffstat (limited to 'target/linux/atheros-2.6/files/arch/mips/atheros/prom.c')
| -rw-r--r-- | target/linux/atheros-2.6/files/arch/mips/atheros/prom.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/target/linux/atheros-2.6/files/arch/mips/atheros/prom.c b/target/linux/atheros-2.6/files/arch/mips/atheros/prom.c new file mode 100644 index 000000000..6dfa13c77 --- /dev/null +++ b/target/linux/atheros-2.6/files/arch/mips/atheros/prom.c @@ -0,0 +1,67 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright MontaVista Software Inc + * Copyright (C) 2003 Atheros Communications, Inc., All Rights Reserved. + * Copyright (C) 2006 FON Technology, SL. + * Copyright (C) 2006 Imre Kaloz <kaloz@openwrt.org> + * Copyright (C) 2006 Felix Fietkau <nbd@openwrt.org> + */ + +/* + * Prom setup file for ar531x + */ + +#include <linux/init.h> +#include <linux/autoconf.h> +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/mm.h> +#include <linux/bootmem.h> + +#include <asm/bootinfo.h> +#include <asm/addrspace.h> +#include "ar531x.h" + +void __init prom_init(void) +{ + u32 memsize, memcfg; + + mips_machgroup = MACH_GROUP_ATHEROS; + mips_machtype = -1; + + /* + * Atheros CPUs before the AR2315 are using MIPS 4Kc core, later designs are + * using MIPS 4KEc R2 core. This makes it easy to determine the board at runtime. + */ + + if (current_cpu_data.cputype == CPU_4KEC) { + mips_machtype = MACH_ATHEROS_AR5315; + + memcfg = sysRegRead(AR5315_MEM_CFG); + memsize = 1 + ((memcfg & SDRAM_DATA_WIDTH_M) >> SDRAM_DATA_WIDTH_S); + memsize <<= 1 + ((memcfg & SDRAM_COL_WIDTH_M) >> SDRAM_COL_WIDTH_S); + memsize <<= 1 + ((memcfg & SDRAM_ROW_WIDTH_M) >> SDRAM_ROW_WIDTH_S); + memsize <<= 3; + } else { + int bank0AC, bank1AC; + + mips_machtype = MACH_ATHEROS_AR5312; + + memcfg = sysRegRead(AR531X_MEM_CFG1); + bank0AC = (memcfg & MEM_CFG1_AC0) >> MEM_CFG1_AC0_S; + bank1AC = (memcfg & MEM_CFG1_AC1) >> MEM_CFG1_AC1_S; + memsize = (bank0AC ? (1 << (bank0AC+1)) : 0) + + (bank1AC ? (1 << (bank1AC+1)) : 0); + memsize <<= 20; + } + + add_memory_region(0, memsize, BOOT_MEM_RAM); + strcpy(arcs_cmdline, "console=ttyS0,9600 rootfstype=squashfs,jffs2"); +} + +void __init prom_free_prom_memory(void) +{ +} |