From: Benjamin Herrenschmidt Date: Fri, 21 Dec 2007 04:39:31 +0000 (+1100) Subject: [POWERPC] 4xx: Adds decoding of 440SPE memory size to boot wrapper library X-Git-Tag: v2.6.25-rc1~1131^2~184 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d23f5099297c0f017ba4fb165dc9879bda11f9ce;p=linux-2.6 [POWERPC] 4xx: Adds decoding of 440SPE memory size to boot wrapper library This adds a function to the bootwrapper 4xx library to decode memory size on 440SPE processors. Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Josh Boyer --- diff --git a/arch/powerpc/boot/4xx.c b/arch/powerpc/boot/4xx.c index 852992b146..d16ea10d75 100644 --- a/arch/powerpc/boot/4xx.c +++ b/arch/powerpc/boot/4xx.c @@ -22,16 +22,14 @@ #include "dcr.h" /* Read the 4xx SDRAM controller to get size of system memory. */ -void ibm4xx_fixup_memsize(void) +void ibm4xx_sdram_fixup_memsize(void) { int i; unsigned long memsize, bank_config; memsize = 0; for (i = 0; i < ARRAY_SIZE(sdram_bxcr); i++) { - mtdcr(DCRN_SDRAM0_CFGADDR, sdram_bxcr[i]); - bank_config = mfdcr(DCRN_SDRAM0_CFGDATA); - + bank_config = SDRAM0_READ(sdram_bxcr[i]); if (bank_config & SDRAM_CONFIG_BANK_ENABLE) memsize += SDRAM_CONFIG_BANK_SIZE(bank_config); } @@ -39,6 +37,69 @@ void ibm4xx_fixup_memsize(void) dt_fixup_memory(0, memsize); } +/* Read the 440SPe MQ controller to get size of system memory. */ +#define DCRN_MQ0_B0BAS 0x40 +#define DCRN_MQ0_B1BAS 0x41 +#define DCRN_MQ0_B2BAS 0x42 +#define DCRN_MQ0_B3BAS 0x43 + +static u64 ibm440spe_decode_bas(u32 bas) +{ + u64 base = ((u64)(bas & 0xFFE00000u)) << 2; + + /* open coded because I'm paranoid about invalid values */ + switch ((bas >> 4) & 0xFFF) { + case 0: + return 0; + case 0xffc: + return base + 0x000800000ull; + case 0xff8: + return base + 0x001000000ull; + case 0xff0: + return base + 0x002000000ull; + case 0xfe0: + return base + 0x004000000ull; + case 0xfc0: + return base + 0x008000000ull; + case 0xf80: + return base + 0x010000000ull; + case 0xf00: + return base + 0x020000000ull; + case 0xe00: + return base + 0x040000000ull; + case 0xc00: + return base + 0x080000000ull; + case 0x800: + return base + 0x100000000ull; + } + printf("Memory BAS value 0x%08x unsupported !\n", bas); + return 0; +} + +void ibm440spe_fixup_memsize(void) +{ + u64 banktop, memsize = 0; + + /* Ultimately, we should directly construct the memory node + * so we are able to handle holes in the memory address space + */ + banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B0BAS)); + if (banktop > memsize) + memsize = banktop; + banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B1BAS)); + if (banktop > memsize) + memsize = banktop; + banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B2BAS)); + if (banktop > memsize) + memsize = banktop; + banktop = ibm440spe_decode_bas(mfdcr(DCRN_MQ0_B3BAS)); + if (banktop > memsize) + memsize = banktop; + + dt_fixup_memory(0, memsize); +} + + /* 4xx DDR1/2 Denali memory controller support */ /* DDR0 registers */ #define DDR0_02 2 @@ -77,19 +138,13 @@ void ibm4xx_fixup_memsize(void) #define DDR_GET_VAL(val, mask, shift) (((val) >> (shift)) & (mask)) -static inline u32 mfdcr_sdram0(u32 reg) -{ - mtdcr(DCRN_SDRAM0_CFGADDR, reg); - return mfdcr(DCRN_SDRAM0_CFGDATA); -} - void ibm4xx_denali_fixup_memsize(void) { u32 val, max_cs, max_col, max_row; u32 cs, col, row, bank, dpath; unsigned long memsize; - val = mfdcr_sdram0(DDR0_02); + val = SDRAM0_READ(DDR0_02); if (!DDR_GET_VAL(val, DDR_START, DDR_START_SHIFT)) fatal("DDR controller is not initialized\n"); @@ -99,7 +154,7 @@ void ibm4xx_denali_fixup_memsize(void) max_row = DDR_GET_VAL(val, DDR_MAX_ROW_REG, DDR_MAX_ROW_REG_SHIFT); /* get CS value */ - val = mfdcr_sdram0(DDR0_10); + val = SDRAM0_READ(DDR0_10); val = DDR_GET_VAL(val, DDR_CS_MAP, DDR_CS_MAP_SHIFT); cs = 0; @@ -115,7 +170,7 @@ void ibm4xx_denali_fixup_memsize(void) fatal("DDR wrong CS configuration\n"); /* get data path bytes */ - val = mfdcr_sdram0(DDR0_14); + val = SDRAM0_READ(DDR0_14); if (DDR_GET_VAL(val, DDR_REDUC, DDR_REDUC_SHIFT)) dpath = 8; /* 64 bits */ @@ -123,7 +178,7 @@ void ibm4xx_denali_fixup_memsize(void) dpath = 4; /* 32 bits */ /* get address pins (rows) */ - val = mfdcr_sdram0(DDR0_42); + val = SDRAM0_READ(DDR0_42); row = DDR_GET_VAL(val, DDR_APIN, DDR_APIN_SHIFT); if (row > max_row) @@ -131,7 +186,7 @@ void ibm4xx_denali_fixup_memsize(void) row = max_row - row; /* get collomn size and banks */ - val = mfdcr_sdram0(DDR0_43); + val = SDRAM0_READ(DDR0_43); col = DDR_GET_VAL(val, DDR_COL_SZ, DDR_COL_SZ_SHIFT); if (col > max_col) diff --git a/arch/powerpc/boot/4xx.h b/arch/powerpc/boot/4xx.h index 6af14a01c7..5296350ac3 100644 --- a/arch/powerpc/boot/4xx.h +++ b/arch/powerpc/boot/4xx.h @@ -11,7 +11,8 @@ #ifndef _POWERPC_BOOT_4XX_H_ #define _POWERPC_BOOT_4XX_H_ -void ibm4xx_fixup_memsize(void); +void ibm4xx_sdram_fixup_memsize(void); +void ibm440spe_fixup_memsize(void); void ibm4xx_denali_fixup_memsize(void); void ibm44x_dbcr_reset(void); void ibm40x_dbcr_reset(void); diff --git a/arch/powerpc/boot/bamboo.c b/arch/powerpc/boot/bamboo.c index e634359d98..a6146d9ada 100644 --- a/arch/powerpc/boot/bamboo.c +++ b/arch/powerpc/boot/bamboo.c @@ -31,7 +31,7 @@ static void bamboo_fixups(void) unsigned long sysclk = 33333333; ibm440ep_fixup_clocks(sysclk, 11059200); - ibm4xx_fixup_memsize(); + ibm4xx_sdram_fixup_memsize(); ibm4xx_quiesce_eth((u32 *)0xef600e00, (u32 *)0xef600f00); dt_fixup_mac_addresses(bamboo_mac0, bamboo_mac1); } diff --git a/arch/powerpc/boot/cuboot-taishan.c b/arch/powerpc/boot/cuboot-taishan.c index 4ef92021d0..afd828d050 100644 --- a/arch/powerpc/boot/cuboot-taishan.c +++ b/arch/powerpc/boot/cuboot-taishan.c @@ -38,7 +38,7 @@ static void taishan_fixups(void) so we just use that code for now at least */ ibm440ep_fixup_clocks(sysclk, 6 * 1843200); - ibm4xx_fixup_memsize(); + ibm4xx_sdram_fixup_memsize(); dt_fixup_mac_addresses(bd.bi_enetaddr, bd.bi_enet1addr); diff --git a/arch/powerpc/boot/dcr.h b/arch/powerpc/boot/dcr.h index 83b88aa928..8e7ee2a429 100644 --- a/arch/powerpc/boot/dcr.h +++ b/arch/powerpc/boot/dcr.h @@ -14,12 +14,20 @@ #define DCRN_SDRAM0_CFGADDR 0x010 #define DCRN_SDRAM0_CFGDATA 0x011 +#define SDRAM0_READ(offset) ({\ + mtdcr(DCRN_SDRAM0_CFGADDR, offset); \ + mfdcr(DCRN_SDRAM0_CFGDATA); }) +#define SDRAM0_WRITE(offset, data) ({\ + mtdcr(DCRN_SDRAM0_CFGADDR, offset); \ + mtdcr(DCRN_SDRAM0_CFGDATA, data); }) + #define SDRAM0_B0CR 0x40 #define SDRAM0_B1CR 0x44 #define SDRAM0_B2CR 0x48 #define SDRAM0_B3CR 0x4c -static const unsigned long sdram_bxcr[] = { SDRAM0_B0CR, SDRAM0_B1CR, SDRAM0_B2CR, SDRAM0_B3CR }; +static const unsigned long sdram_bxcr[] = { SDRAM0_B0CR, SDRAM0_B1CR, + SDRAM0_B2CR, SDRAM0_B3CR }; #define SDRAM_CONFIG_BANK_ENABLE 0x00000001 #define SDRAM_CONFIG_SIZE_MASK 0x000e0000 diff --git a/arch/powerpc/boot/ebony.c b/arch/powerpc/boot/ebony.c index ee31be5e63..68beb49471 100644 --- a/arch/powerpc/boot/ebony.c +++ b/arch/powerpc/boot/ebony.c @@ -134,7 +134,7 @@ static void ebony_fixups(void) unsigned long sysclk = 33000000; ibm440gp_fixup_clocks(sysclk, 6 * 1843200); - ibm4xx_fixup_memsize(); + ibm4xx_sdram_fixup_memsize(); dt_fixup_mac_addresses(ebony_mac0, ebony_mac1); ibm4xx_fixup_ebc_ranges("/plb/opb/ebc"); ebony_flashsel_fixup(); diff --git a/arch/powerpc/boot/treeboot-walnut.c b/arch/powerpc/boot/treeboot-walnut.c index 330485f478..472e36605a 100644 --- a/arch/powerpc/boot/treeboot-walnut.c +++ b/arch/powerpc/boot/treeboot-walnut.c @@ -63,7 +63,7 @@ static void walnut_flashsel_fixup(void) #define WALNUT_OPENBIOS_MAC_OFF 0xfffffe0b static void walnut_fixups(void) { - ibm4xx_fixup_memsize(); + ibm4xx_sdram_fixup_memsize(); ibm405gp_fixup_clocks(33330000, 0xa8c000); ibm4xx_quiesce_eth((u32 *)0xef600800, NULL); ibm4xx_fixup_ebc_ranges("/plb/ebc");