From 5d812b8b4ad9667c77a5bf92b4ba81699abc9fc3 Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Wed, 9 Jul 2008 17:33:57 +0200 Subject: ppc4xx: Enable support for > 2GB SDRAM on AMCC Katmai Newer PPC's like 440SPe, 460EX/GT can be equipped with more than 2GB of SDRAM. To support such configurations, we "only" map the first 2GB via the TLB's. We need some free virtual address space for the remaining peripherals like, SoC devices, FLASH etc. Note that ECC is currently not supported on configurations with more than 2GB SDRAM. This is because we only map the first 2GB on such systems, and therefore the ECC parity byte of the remaining area can't be written. Signed-off-by: Stefan Roese --- include/asm-ppc/ppc4xx-sdram.h | 4 ++-- include/configs/katmai.h | 7 +++++++ 2 files changed, 9 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/asm-ppc/ppc4xx-sdram.h b/include/asm-ppc/ppc4xx-sdram.h index 83931f1..e151f0c 100644 --- a/include/asm-ppc/ppc4xx-sdram.h +++ b/include/asm-ppc/ppc4xx-sdram.h @@ -284,8 +284,8 @@ #if defined(CONFIG_440SPE) || \ defined(CONFIG_460EX) || defined(CONFIG_460GT) #define SDRAM_RXBAS_SDBA_MASK 0xFFE00000 /* Base address */ -#define SDRAM_RXBAS_SDBA_ENCODE(n) ((((u32)(n))&0xFFE00000)>>2) -#define SDRAM_RXBAS_SDBA_DECODE(n) ((((u32)(n))&0xFFE00000)<<2) +#define SDRAM_RXBAS_SDBA_ENCODE(n) ((u32)(((phys_size_t)(n) >> 2) & 0xFFE00000)) +#define SDRAM_RXBAS_SDBA_DECODE(n) ((((phys_size_t)(n)) & 0xFFE00000) << 2) #endif /* CONFIG_440SPE */ #if defined(CONFIG_440SP) #define SDRAM_RXBAS_SDBA_MASK 0xFF800000 /* Base address */ diff --git a/include/configs/katmai.h b/include/configs/katmai.h index d3789bd..f07e470 100644 --- a/include/configs/katmai.h +++ b/include/configs/katmai.h @@ -41,6 +41,13 @@ #define CFG_4xx_RESET_TYPE 0x2 /* use chip reset on this board */ /* + * Enable this board for more than 2GB of SDRAM + */ +#define CONFIG_PHYS_64BIT +#define CONFIG_VERY_BIG_RAM +#define CONFIG_MAX_MEM_MAPPED ((phys_size_t)2 << 30) + +/* * Include common defines/options for all AMCC eval boards */ #define CONFIG_HOSTNAME katmai -- cgit v1.1