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[Blackfin] arch: detect the memory available in the system on the fly by default

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detect the memory available in the system on the fly by default
rather than forcing people to set this manually in the kconfig

Signed-off-by: Mike Frysinger <vapier.adi@gmail.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
This commit is contained in:
Mike Frysinger 2008-04-25 02:04:05 +08:00 committed by Bryan Wu
parent a81501af19
commit a086ee2268
4 changed files with 67 additions and 17 deletions
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26
arch/blackfin/Kconfig
View file

@ -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)

10
arch/blackfin/kernel/cplb-nompu/cplbinit.c
View file

@ -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];

45
arch/blackfin/kernel/setup.c
View file

@ -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));

3
arch/blackfin/mach-common/arch_checks.c
View file

@ -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