hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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