diff options
Diffstat (limited to 'target/linux/adm5120/files-3.14/arch/mips/adm5120/common/memory.c')
| -rw-r--r-- | target/linux/adm5120/files-3.14/arch/mips/adm5120/common/memory.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/target/linux/adm5120/files-3.14/arch/mips/adm5120/common/memory.c b/target/linux/adm5120/files-3.14/arch/mips/adm5120/common/memory.c deleted file mode 100644 index d07266fa38..0000000000 --- a/target/linux/adm5120/files-3.14/arch/mips/adm5120/common/memory.c +++ /dev/null @@ -1,149 +0,0 @@ -/* - * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 as published - * by the Free Software Foundation. - * - */ - -#include <linux/init.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/io.h> - -#include <asm/bootinfo.h> -#include <asm/addrspace.h> - -#include <asm/mach-adm5120/adm5120_info.h> -#include <asm/mach-adm5120/adm5120_defs.h> -#include <asm/mach-adm5120/adm5120_switch.h> -#include <asm/mach-adm5120/adm5120_mpmc.h> - -#ifdef DEBUG -# define mem_dbg(f, a...) printk(KERN_INFO "mem_detect: " f, ## a) -#else -# define mem_dbg(f, a...) -#endif - -unsigned long adm5120_memsize; - -#define MEM_READL(a) __raw_readl((void __iomem *)(a)) -#define MEM_WRITEL(a, v) __raw_writel((v), (void __iomem *)(a)) - -static int __init mem_check_pattern(u8 *addr, unsigned long offs) -{ - u32 *p1 = (u32 *)addr; - u32 *p2 = (u32 *)(addr+offs); - u32 t, u, v; - - /* save original value */ - t = MEM_READL(p1); - - u = MEM_READL(p2); - if (t != u) - return 0; - - v = 0x55555555; - if (u == v) - v = 0xAAAAAAAA; - - mem_dbg("write 0x%08X to 0x%08lX\n", v, (unsigned long)p1); - - MEM_WRITEL(p1, v); - adm5120_ndelay(1000); - u = MEM_READL(p2); - - mem_dbg("pattern at 0x%08lX is 0x%08X\n", (unsigned long)p2, u); - - /* restore original value */ - MEM_WRITEL(p1, t); - - return (v == u); -} - -static void __init adm5120_detect_memsize(void) -{ - u32 memctrl; - u32 size, maxsize; - u8 *p; - - memctrl = SW_READ_REG(SWITCH_REG_MEMCTRL); - switch (memctrl & MEMCTRL_SDRS_MASK) { - case MEMCTRL_SDRS_4M: - maxsize = 4 << 20; - break; - case MEMCTRL_SDRS_8M: - maxsize = 8 << 20; - break; - case MEMCTRL_SDRS_16M: - maxsize = 16 << 20; - break; - default: - maxsize = 64 << 20; - break; - } - - mem_dbg("checking for %uMB chip in 1st bank\n", maxsize >> 20); - - /* detect size of the 1st SDRAM bank */ - p = (u8 *)KSEG1ADDR(0); - for (size = 2<<20; size <= (maxsize >> 1); size <<= 1) { - if (mem_check_pattern(p, size)) { - /* mirrored address */ - mem_dbg("mirrored data found at offset 0x%08X\n", size); - break; - } - } - - mem_dbg("chip size in 1st bank is %uMB\n", size >> 20); - adm5120_memsize = size; - - if (size != maxsize) - /* 2nd bank is not supported */ - goto out; - - if ((memctrl & MEMCTRL_SDR1_ENABLE) == 0) - /* 2nd bank is disabled */ - goto out; - - /* - * some bootloaders enable 2nd bank, even if the 2nd SDRAM chip - * are missing. - */ - mem_dbg("check presence of 2nd bank\n"); - - p = (u8 *)KSEG1ADDR(maxsize+size-4); - if (mem_check_pattern(p, 0)) - adm5120_memsize += size; - - if (maxsize != size) { - /* adjusting MECTRL register */ - memctrl &= ~(MEMCTRL_SDRS_MASK); - switch (size>>20) { - case 4: - memctrl |= MEMCTRL_SDRS_4M; - break; - case 8: - memctrl |= MEMCTRL_SDRS_8M; - break; - case 16: - memctrl |= MEMCTRL_SDRS_16M; - break; - default: - memctrl |= MEMCTRL_SDRS_64M; - break; - } - SW_WRITE_REG(SWITCH_REG_MEMCTRL, memctrl); - } - -out: - mem_dbg("%dx%uMB memory found\n", (adm5120_memsize == size) ? 1 : 2 , - size>>20); -} - -void __init adm5120_mem_init(void) -{ - adm5120_detect_memsize(); - add_memory_region(0, adm5120_memsize, BOOT_MEM_RAM); -} |