mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-08-21 08:19:28 +00:00
Code Issues Releases Wiki Activity

Blackfin: handle BF561 Core B memory regions better when SMP=n

Browse source 
Rather than assume Core B is always run with caches turned on, let people
load into any of the on-chip memory regions.  It is their business how the
SRAM/Cache regions are utilized, so don't prevent them from being able to
load into them.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2009-06-29 14:20:10 -04:00
parent 8399a74f61
commit fb4b5d3a37
2 changed files with 29 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
arch/blackfin/kernel/process.c
View file

@ -361,7 +361,7 @@ static inline
int in_mem_const(unsigned long addr, unsigned long size,
unsigned long const_addr, unsigned long const_size)
{
return in_mem_const_off(addr, 0, size, const_addr, const_size);
return in_mem_const_off(addr, size, 0, const_addr, const_size);
}
#define IN_ASYNC(bnum, bctlnum) \
({ \
@ -390,13 +390,13 @@ int bfin_mem_access_type(unsigned long addr, unsigned long size)
if (in_mem_const(addr, size, L1_DATA_B_START, L1_DATA_B_LENGTH))
return cpu == 0 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
#ifdef COREB_L1_CODE_START
if (in_mem_const(addr, size, COREB_L1_CODE_START, L1_CODE_LENGTH))
if (in_mem_const(addr, size, COREB_L1_CODE_START, COREB_L1_CODE_LENGTH))
return cpu == 1 ? BFIN_MEM_ACCESS_ITEST : BFIN_MEM_ACCESS_IDMA;
if (in_mem_const(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH))
return cpu == 1 ? BFIN_MEM_ACCESS_CORE_ONLY : -EFAULT;
if (in_mem_const(addr, size, COREB_L1_DATA_A_START, L1_DATA_A_LENGTH))
if (in_mem_const(addr, size, COREB_L1_DATA_A_START, COREB_L1_DATA_A_LENGTH))
return cpu == 1 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
if (in_mem_const(addr, size, COREB_L1_DATA_B_START, L1_DATA_B_LENGTH))
if (in_mem_const(addr, size, COREB_L1_DATA_B_START, COREB_L1_DATA_B_LENGTH))
return cpu == 1 ? BFIN_MEM_ACCESS_CORE : BFIN_MEM_ACCESS_IDMA;
#endif
if (in_mem_const(addr, size, L2_START, L2_LENGTH))
@ -472,13 +472,13 @@ int _access_ok(unsigned long addr, unsigned long size)
if (in_mem_const_off(addr, size, _ebss_b_l1 - _sdata_b_l1, L1_DATA_B_START, L1_DATA_B_LENGTH))
return 1;
#ifdef COREB_L1_CODE_START
if (in_mem_const(addr, size, COREB_L1_CODE_START, L1_CODE_LENGTH))
if (in_mem_const(addr, size, COREB_L1_CODE_START, COREB_L1_CODE_LENGTH))
return 1;
if (in_mem_const(addr, size, COREB_L1_SCRATCH_START, L1_SCRATCH_LENGTH))
return 1;
if (in_mem_const(addr, size, COREB_L1_DATA_A_START, L1_DATA_A_LENGTH))
if (in_mem_const(addr, size, COREB_L1_DATA_A_START, COREB_L1_DATA_A_LENGTH))
return 1;
if (in_mem_const(addr, size, COREB_L1_DATA_B_START, L1_DATA_B_LENGTH))
if (in_mem_const(addr, size, COREB_L1_DATA_B_START, COREB_L1_DATA_B_LENGTH))
return 1;
#endif
if (in_mem_const_off(addr, size, _ebss_l2 - _stext_l2, L2_START, L2_LENGTH))

23
arch/blackfin/mach-bf561/include/mach/mem_map.h
View file

@ -37,7 +37,6 @@
/* Memory Map for ADSP-BF561 processors */
#ifdef CONFIG_BF561
#define COREA_L1_CODE_START 0xFFA00000
#define COREA_L1_DATA_A_START 0xFF800000
#define COREA_L1_DATA_B_START 0xFF900000
@ -74,6 +73,28 @@
#define BFIN_DCACHESIZE (0*1024)
#define BFIN_DSUPBANKS 0
#endif /*CONFIG_BFIN_DCACHE*/
/*
* If we are in SMP mode, then the cache settings of Core B will match
* the settings of Core A. If we aren't, then we assume Core B is not
* using any cache. This allows the rest of the kernel to work with
* the core in either mode as we are only loading user code into it and
* it is the user's problem to make sure they aren't doing something
* stupid there.
*
* Note that we treat the L1 code region as a contiguous blob to make
* the rest of the kernel simpler. Easier to check one region than a
* bunch of small ones. Again, possible misbehavior here is the fault
* of the user -- don't try to use memory that doesn't exist.
*/
#ifdef CONFIG_SMP
# define COREB_L1_CODE_LENGTH L1_CODE_LENGTH
# define COREB_L1_DATA_A_LENGTH L1_DATA_A_LENGTH
# define COREB_L1_DATA_B_LENGTH L1_DATA_B_LENGTH
#else
# define COREB_L1_CODE_LENGTH 0x14000
# define COREB_L1_DATA_A_LENGTH 0x8000
# define COREB_L1_DATA_B_LENGTH 0x8000
#endif
/* Level 2 Memory */