Date: Thu, 4 Dec 2008 02:08:12 GMT From: Sam Leffler <sam@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 154032 for review Message-ID: <200812040208.mB428CYB072568@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=154032 Change 154032 by sam@sam_ebb on 2008/12/04 02:07:57 correct ixp425 ram sizing Affected files ... .. //depot/projects/vap/sys/arm/xscale/ixp425/ixp425_mem.c#4 edit Differences ... ==== //depot/projects/vap/sys/arm/xscale/ixp425/ixp425_mem.c#4 (text+ko) ==== @@ -87,14 +87,16 @@ uint32_t ixp435_ddram_size(void) { -#define MCU_REG_READ(x) (*(volatile uint32_t *)(IXP435_MCU_VBASE + (x))) +#define MCU_REG_READ(x) (*(volatile uint32_t *)(IXP425_MCU_VBASE + (x))) + uint32_t sbr0; -printf("sdir 0x%x\n", MCU_REG_READ(MCU_DDR_SDIR));/*XXX*/ -printf("sdcr0 0x%x\n", MCU_REG_READ(MCU_DDR_SDCR0));/*XXX*/ -printf("sdcr1 0x%x\n", MCU_REG_READ(MCU_DDR_SDCR1));/*XXX*/ -printf("sdbr 0x%x\n", MCU_REG_READ(MCU_DDR_SDBR));/*XXX*/ -printf("sbr0 0x%x\n", MCU_REG_READ(MCU_DDR_SBR0));/*XXX*/ -printf("sbr1 0x%x\n", MCU_REG_READ(MCU_DDR_SBR1));/*XXX*/ - return 128*1024*1024; /*XXX*/ + /* + * Table 198, page 516 shows DDR-I/II SDRAM bank sizes + * for SBR0 and SBR1. The manual states both banks must + * be programmed to be the same size. We just assume + * it's done right and calculate 2x for the memory size. + */ + sbr0 = MCU_REG_READ(MCU_DDR_SBR0); + return 2 * 16*(sbr0 & 0x7f) * 1024 * 1024; #undef MCU_REG_READ }
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