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| author | Graf Yang <graf.yang@analog.com> | 2008-10-16 16:50:46 +0200 |
|---|---|---|
| committer | Bryan Wu <cooloney@kernel.org> | 2008-10-16 16:50:46 +0200 |
| commit | b4f5c58fd1de11f698d95beb1e67d5b8f97fbe66 (patch) | |
| tree | 855338d2cad2a1b3aa144a4e6cbc0471d973e76d | |
| parent | Blackfin arch: add read/write IO accessor functions to Blackfin (diff) | |
| download | linux-b4f5c58fd1de11f698d95beb1e67d5b8f97fbe66.tar.xz linux-b4f5c58fd1de11f698d95beb1e67d5b8f97fbe66.zip | |
Blackfin arch: Zero out bss region in L1/L2 memory.
Signed-off-by: Graf Yang <graf.yang@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
| -rw-r--r-- | arch/blackfin/mach-common/head.S | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/arch/blackfin/mach-common/head.S b/arch/blackfin/mach-common/head.S index 3069df580729..f123a62e2451 100644 --- a/arch/blackfin/mach-common/head.S +++ b/arch/blackfin/mach-common/head.S @@ -206,6 +206,60 @@ ENTRY(_real_start) w[p0] = r0; ssync; +#if L1_DATA_A_LENGTH > 0 + r1.l = __sbss_l1; + r1.h = __sbss_l1; + r2.l = __ebss_l1; + r2.h = __ebss_l1; + r0 = 0 (z); + r2 = r2 - r1; + cc = r2 == 0; + if cc jump .L_a_l1_done; + r2 >>= 2; + p1 = r1; + p2 = r2; + lsetup (.L_clear_a_l1, .L_clear_a_l1 ) lc0 = p2; +.L_clear_a_l1: + [p1++] = r0; +.L_a_l1_done: +#endif + +#if L1_DATA_B_LENGTH > 0 + r1.l = __sbss_b_l1; + r1.h = __sbss_b_l1; + r2.l = __ebss_b_l1; + r2.h = __ebss_b_l1; + r0 = 0 (z); + r2 = r2 - r1; + cc = r2 == 0; + if cc jump .L_b_l1_done; + r2 >>= 2; + p1 = r1; + p2 = r2; + lsetup (.L_clear_b_l1, .L_clear_b_l1 ) lc0 = p2; +.L_clear_b_l1: + [p1++] = r0; +.L_b_l1_done: +#endif + +#if L2_LENGTH > 0 + r1.l = __sbss_l2; + r1.h = __sbss_l2; + r2.l = __ebss_l2; + r2.h = __ebss_l2; + r0 = 0 (z); + r2 = r2 - r1; + cc = r2 == 0; + if cc jump .L_l2_done; + r2 >>= 2; + p1 = r1; + p2 = r2; + lsetup (.L_clear_l2, .L_clear_l2 ) lc0 = p2; +.L_clear_l2: + [p1++] = r0; +.L_l2_done: +#endif + /* Zero out the bss region * Note: this will fail if bss is 0 bytes ... */ |