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| author | Bernd Schmidt <bernd.schmidt@analog.com> | 2008-01-27 18:39:16 +0800 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2008-01-27 18:39:16 +0800 |
| commit | b97b8a998397e8c64699559099fa9febffae2b4d (patch) | |
| tree | 689188b6336cf45b4391f5bc764878e342b9ac90 /arch/blackfin/mach-common | |
| parent | 2047e40d724d42928c0b5994a1568c1b738efdb7 (diff) | |
| download | linux-b97b8a998397e8c64699559099fa9febffae2b4d.tar.bz2 | |
[Blackfin] arch: Initial checkin of the memory protection support.
Enable it with CONFIG_MPU.
Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/mach-common')
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S index 58f7ad617992..c2e81a10c47b 100644 --- a/arch/blackfin/mach-common/entry.S +++ b/arch/blackfin/mach-common/entry.S @@ -95,6 +95,9 @@ ENTRY(_ex_workaround_261) R6 = 0x26; /* Data CPLB Miss */ cc = R6 == R7; if cc jump _ex_dcplb_miss (BP); + R6 = 0x23; /* Data CPLB Miss */ + cc = R6 == R7; + if cc jump _ex_dcplb_viol (BP); /* Handle 0x23 Data CPLB Protection Violation * and Data CPLB Multiple Hits - Linux Trap Zero */ @@ -102,17 +105,33 @@ ENTRY(_ex_workaround_261) ENDPROC(_ex_workaround_261) #else +#ifdef CONFIG_MPU +#define _ex_dviol _ex_dcplb_viol +#else #define _ex_dviol _ex_trap_c +#endif #define _ex_dmiss _ex_dcplb_miss #define _ex_dmult _ex_trap_c #endif + +ENTRY(_ex_dcplb_viol) ENTRY(_ex_dcplb_miss) ENTRY(_ex_icplb_miss) (R7:6,P5:4) = [sp++]; ASTAT = [sp++]; SAVE_ALL_SYS +#ifdef CONFIG_MPU + R0 = SEQSTAT; + R1 = SP; + sp += -12; + call _cplb_hdr; + sp += 12; + CC = R0 == 0; + IF !CC JUMP _handle_bad_cplb; +#else call __cplb_hdr; +#endif DEBUG_START_HWTRACE(p5, r7) RESTORE_ALL_SYS SP = EX_SCRATCH_REG; |