From 2e651b248348e156d193e46f7a5b827d74af90d6 Mon Sep 17 00:00:00 2001 From: Joe Hershberger Date: Tue, 11 Oct 2011 23:57:31 -0500 Subject: mpc83xx: Rename CONFIG_SYS_DDR_CONFIG and cleanup DDR csbnds code Rename CONFIG_SYS_DDR_CONFIG to include which CS it is configuring Cleanup the setting of the csnbds to respect the setting of CONFIG_SYS_DDR_SDRAM_BASE Use __ilog2 instead of writing the code to compute it Disable unused CS configs Ensure ddrlaw.bar is configured Signed-off-by: Joe Hershberger Cc: Joe Hershberger Signed-off-by: Kim Phillips --- board/freescale/mpc8349itx/mpc8349itx.c | 28 ++++++++++++++++------------ 1 file changed, 16 insertions(+), 12 deletions(-) (limited to 'board/freescale/mpc8349itx') diff --git a/board/freescale/mpc8349itx/mpc8349itx.c b/board/freescale/mpc8349itx/mpc8349itx.c index 5647579..9cc808e 100644 --- a/board/freescale/mpc8349itx/mpc8349itx.c +++ b/board/freescale/mpc8349itx/mpc8349itx.c @@ -43,23 +43,27 @@ int fixed_sdram(void) { volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR; - u32 ddr_size; /* The size of RAM, in bytes */ - u32 ddr_size_log2 = 0; - - for (ddr_size = CONFIG_SYS_DDR_SIZE * 0x100000; ddr_size > 1; ddr_size >>= 1) { - if (ddr_size & 1) { - return -1; - } - ddr_size_log2++; - } + /* The size of RAM, in bytes */ + u32 ddr_size = CONFIG_SYS_DDR_SIZE << 20; + u32 ddr_size_log2 = __ilog2(ddr_size); im->sysconf.ddrlaw[0].ar = LAWAR_EN | ((ddr_size_log2 - 1) & LAWAR_SIZE); im->sysconf.ddrlaw[0].bar = CONFIG_SYS_DDR_SDRAM_BASE & 0xfffff000; - /* Only one CS0 for DDR */ - im->ddr.csbnds[0].csbnds = 0x0000000f; - im->ddr.cs_config[0] = CONFIG_SYS_DDR_CONFIG; +#if ((CONFIG_SYS_DDR_SDRAM_BASE & 0x00FFFFFF) != 0) +#warning Chip select bounds is only configurable in 16MB increments +#endif + im->ddr.csbnds[0].csbnds = + ((CONFIG_SYS_DDR_SDRAM_BASE >> CSBNDS_SA_SHIFT) & CSBNDS_SA) | + (((CONFIG_SYS_DDR_SDRAM_BASE + ddr_size - 1) >> + CSBNDS_EA_SHIFT) & CSBNDS_EA); + im->ddr.cs_config[0] = CONFIG_SYS_DDR_CS0_CONFIG; + + /* Only one CS for DDR */ + im->ddr.cs_config[1] = 0; + im->ddr.cs_config[2] = 0; + im->ddr.cs_config[3] = 0; debug("cs0_bnds = 0x%08x\n", im->ddr.csbnds[0].csbnds); debug("cs0_config = 0x%08x\n", im->ddr.cs_config[0]); -- cgit v1.1