diff options
| author | Robin Getz <robin.getz@analog.com> | 2007-11-15 10:10:48 +0300 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2007-11-15 10:10:48 +0300 |
| commit | 6a3f0b460cea79f08683cef1862d686a887efd8c (patch) | |
| tree | 4133b0e4e2af811cd96a4ee722f8453e07082266 /arch/blackfin | |
| parent | 0954f70ab1ffd9ad945c88c11877a08baed311c7 (diff) | |
| download | linux-6a3f0b460cea79f08683cef1862d686a887efd8c.tar.xz | |
Blackfin arch: fix bug cplbmgr.S does not exit properly on error condition
https://blackfin.uclinux.org/gf/project/uclinux-dist/tracker/?action=TrackerItemEdit&tracker_item_id=1685
Ensure that cache/protection is turned back on when we get a
fault, and ensure that the initial population of the CPLB tables are
correct - that kernel is locked in CPLB tables
Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin')
| -rw-r--r-- | arch/blackfin/kernel/cplbinit.c | 4 | ||||
| -rw-r--r-- | arch/blackfin/kernel/traps.c | 4 | ||||
| -rw-r--r-- | arch/blackfin/mach-common/cplbmgr.S | 25 |
3 files changed, 22 insertions, 11 deletions
diff --git a/arch/blackfin/kernel/cplbinit.c b/arch/blackfin/kernel/cplbinit.c index f2db6a5e2b5b..7392ac2d2c29 100644 --- a/arch/blackfin/kernel/cplbinit.c +++ b/arch/blackfin/kernel/cplbinit.c @@ -163,8 +163,8 @@ static struct cplb_desc cplb_data[] = { static u16 __init lock_kernel_check(u32 start, u32 end) { - if ((start <= (u32) _stext && end >= (u32) _end) - || (start >= (u32) _stext && end <= (u32) _end)) + if ((end <= (u32) _end && end >= (u32)_stext) || + (start <= (u32) _end && start >= (u32)_stext)) return IN_KERNEL; return 0; } diff --git a/arch/blackfin/kernel/traps.c b/arch/blackfin/kernel/traps.c index ce9981b5339b..fbdf999bd2b5 100644 --- a/arch/blackfin/kernel/traps.c +++ b/arch/blackfin/kernel/traps.c @@ -670,8 +670,8 @@ void dump_bfin_regs(struct pt_regs *fp, void *retaddr) printk("\n"); } else printk("\n" KERN_NOTICE - "Cannot look at the [PC] for it is" - " in unreadable memory - sorry\n"); + "Cannot look at the [PC] <%p> for it is" + " in unreadable memory - sorry\n", retaddr); printk(KERN_NOTICE "\n" KERN_NOTICE "SEQUENCER STATUS:\n"); printk(KERN_NOTICE " SEQSTAT: %08lx IPEND: %04lx SYSCFG: %04lx\n", diff --git a/arch/blackfin/mach-common/cplbmgr.S b/arch/blackfin/mach-common/cplbmgr.S index 946703ef48ff..6f909cbfac7b 100644 --- a/arch/blackfin/mach-common/cplbmgr.S +++ b/arch/blackfin/mach-common/cplbmgr.S @@ -73,7 +73,7 @@ ENTRY(_cplb_mgr) /* ICPLB Miss Exception. We need to choose one of the * currently-installed CPLBs, and replace it with one * from the configuration table. - */ + */ P4.L = LO(ICPLB_FAULT_ADDR); P4.H = HI(ICPLB_FAULT_ADDR); @@ -222,7 +222,7 @@ ENTRY(_cplb_mgr) /* See if failed address > start address */ CC = R4 <= R0(IU); - IF !CC JUMP .Linext; + IF !CC JUMP .Linext; /* extract page size (17:16)*/ R3 = EXTRACT(R2, R1.L) (Z); @@ -271,16 +271,27 @@ ENTRY(_cplb_mgr) /* FAILED CASES*/ .Lno_page_in_table: - ( R7:4,P5:3 ) = [SP++]; R0 = CPLB_NO_ADDR_MATCH; - RTS; + JUMP .Lfail_ret; + .Lall_locked: - ( R7:4,P5:3 ) = [SP++]; R0 = CPLB_NO_UNLOCKED; - RTS; + JUMP .Lfail_ret; + .Lprot_violation: - ( R7:4,P5:3 ) = [SP++]; R0 = CPLB_PROT_VIOL; + +.Lfail_ret: + /* Make sure we turn protection/cache back on, even in the failing case */ + BITSET(R5,ENICPLB_P); + CLI R2; + SSYNC; /* SSYNC required before writing to IMEM_CONTROL. */ + .align 8; + [P4] = R5; + SSYNC; + STI R2; + + ( R7:4,P5:3 ) = [SP++]; RTS; .Ldcplb_write: |