diff options
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/Kconfig | 26 | ||||
| -rw-r--r-- | arch/blackfin/kernel/cplb-nompu/cplbinit.c | 10 | ||||
| -rw-r--r-- | arch/blackfin/kernel/setup.c | 45 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/arch_checks.c | 3 |
4 files changed, 67 insertions, 17 deletions
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig index 308bbe291d8..75bceee9b9a 100644 --- a/arch/blackfin/Kconfig +++ b/arch/blackfin/Kconfig @@ -294,6 +294,11 @@ config BFIN_KERNEL_CLOCK are also not changed, and the Bootloader does 100% of the hardware configuration. +config MEM_SIZE + int "SDRAM Memory Size in MBytes" + depends on BFIN_KERNEL_CLOCK + default 64 + config MEM_ADD_WIDTH int "Memory Address Width" depends on BFIN_KERNEL_CLOCK @@ -373,6 +378,14 @@ config SCLK_DIV This can be between 1 and 15 System Clock = (PLL frequency) / (this setting) +config MAX_MEM_SIZE + int "Max SDRAM Memory Size in MBytes" + depends on !BFIN_KERNEL_CLOCK && !MPU + default 512 + help + This is the max memory size that the kernel will create CPLB + tables for. Your system will not be able to handle any more. + # # Max & Min Speeds for various Chips # @@ -441,19 +454,6 @@ source kernel/time/Kconfig comment "Memory Setup" -config MEM_SIZE - int "SDRAM Memory Size in MBytes" - default 32 if BFIN533_EZKIT - default 64 if BFIN527_EZKIT - default 64 if BFIN537_STAMP - default 64 if BFIN548_EZKIT - default 64 if BFIN561_EZKIT - default 128 if BFIN533_STAMP - default 64 if PNAV10 - default 32 if H8606_HVSISTEMAS - default 64 if BFIN548_BLUETECHNIX_CM - default 64 if BFIN532_IP0X - choice prompt "DDR SDRAM Chip Type" depends on (BFIN548_EZKIT || BFIN548_BLUETECHNIX_CM) diff --git a/arch/blackfin/kernel/cplb-nompu/cplbinit.c b/arch/blackfin/kernel/cplb-nompu/cplbinit.c index f271f39d565..917325bfbd8 100644 --- a/arch/blackfin/kernel/cplb-nompu/cplbinit.c +++ b/arch/blackfin/kernel/cplb-nompu/cplbinit.c @@ -26,6 +26,12 @@ #include <asm/cplb.h> #include <asm/cplbinit.h> +#ifdef CONFIG_MAX_MEM_SIZE +# define CPLB_MEM CONFIG_MAX_MEM_SIZE +#else +# define CPLB_MEM CONFIG_MEM_SIZE +#endif + /* * Number of required data CPLB switchtable entries * MEMSIZE / 4 (we mostly install 4M page size CPLBs @@ -35,7 +41,7 @@ * 1 for CONFIG_DEBUG_HUNT_FOR_ZERO * 1 for ASYNC Memory */ -#define MAX_SWITCH_D_CPLBS (((CONFIG_MEM_SIZE / 4) + 16 + 1 + 1 + 1 \ +#define MAX_SWITCH_D_CPLBS (((CPLB_MEM / 4) + 16 + 1 + 1 + 1 \ + ASYNC_MEMORY_CPLB_COVERAGE) * 2) /* @@ -46,7 +52,7 @@ * possibly 1 for L2 Instruction Memory * 1 for CONFIG_DEBUG_HUNT_FOR_ZERO */ -#define MAX_SWITCH_I_CPLBS (((CONFIG_MEM_SIZE / 4) + 12 + 1 + 1 + 1) * 2) +#define MAX_SWITCH_I_CPLBS (((CPLB_MEM / 4) + 12 + 1 + 1 + 1) * 2) u_long icplb_table[MAX_CPLBS + 1]; diff --git a/arch/blackfin/kernel/setup.c b/arch/blackfin/kernel/setup.c index c2f3e73ba25..d6668328be7 100644 --- a/arch/blackfin/kernel/setup.c +++ b/arch/blackfin/kernel/setup.c @@ -649,6 +649,49 @@ static __init void setup_bootmem_allocator(void) BOOTMEM_DEFAULT); } +#define EBSZ_TO_MEG(ebsz) \ +({ \ + int meg = 0; \ + switch (ebsz & 0xf) { \ + case 0x1: meg = 16; break; \ + case 0x3: meg = 32; break; \ + case 0x5: meg = 64; break; \ + case 0x7: meg = 128; break; \ + case 0x9: meg = 256; break; \ + case 0xb: meg = 512; break; \ + } \ + meg; \ +}) +static inline int __init get_mem_size(void) +{ +#ifdef CONFIG_MEM_SIZE + return CONFIG_MEM_SIZE; +#else +# if defined(EBIU_SDBCTL) +# if defined(BF561_FAMILY) + int ret = 0; + u32 sdbctl = bfin_read_EBIU_SDBCTL(); + ret += EBSZ_TO_MEG(sdbctl >> 0); + ret += EBSZ_TO_MEG(sdbctl >> 8); + ret += EBSZ_TO_MEG(sdbctl >> 16); + ret += EBSZ_TO_MEG(sdbctl >> 24); + return ret; +# else + return EBSZ_TO_MEG(bfin_read_EBIU_SDBCTL()); +# endif +# elif defined(EBIU_DDRCTL1) + switch (bfin_read_EBIU_DDRCTL1() & 0xc0000) { + case DEVSZ_64: return 64; + case DEVSZ_128: return 128; + case DEVSZ_256: return 256; + case DEVSZ_512: return 512; + default: return 0; + } +# endif +#endif + BUG(); +} + void __init setup_arch(char **cmdline_p) { unsigned long sclk, cclk; @@ -669,7 +712,7 @@ void __init setup_arch(char **cmdline_p) /* setup memory defaults from the user config */ physical_mem_end = 0; - _ramend = CONFIG_MEM_SIZE * 1024 * 1024; + _ramend = get_mem_size() * 1024 * 1024; memset(&bfin_memmap, 0, sizeof(bfin_memmap)); diff --git a/arch/blackfin/mach-common/arch_checks.c b/arch/blackfin/mach-common/arch_checks.c index 2f6ce397780..caaab49e9cf 100644 --- a/arch/blackfin/mach-common/arch_checks.c +++ b/arch/blackfin/mach-common/arch_checks.c @@ -54,7 +54,8 @@ #endif /* CONFIG_BFIN_KERNEL_CLOCK */ +#ifdef CONFIG_MEM_SIZE #if (CONFIG_MEM_SIZE % 4) #error "SDRAM mem size must be multible of 4MB" #endif - +#endif |