diff options
Diffstat (limited to 'recipes/mythtv/mythtv-0.21/no-cortex-deadlock.patch')
| -rw-r--r-- | recipes/mythtv/mythtv-0.21/no-cortex-deadlock.patch | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/recipes/mythtv/mythtv-0.21/no-cortex-deadlock.patch b/recipes/mythtv/mythtv-0.21/no-cortex-deadlock.patch new file mode 100644 index 0000000000..4e93af196a --- /dev/null +++ b/recipes/mythtv/mythtv-0.21/no-cortex-deadlock.patch @@ -0,0 +1,115 @@ +From: Mans Rullgard <mans@mansr.com> +Date: Tue, 29 Jul 2008 21:13:14 +0000 (+0100) +Subject: ARM: work around Cortex-A8 erratum 451034 +X-Git-Url: http://git.mansr.com/?p=ffmpeg.mru;a=commitdiff_plain;h=c6bbb0c33f6f681b8265a43f8744735de5a9d45e + +ARM: work around Cortex-A8 erratum 451034 + +On Cortex-A8 r1p0 and r1p1, executing a NEON store with an integer +store in the store buffer, can cause a processor deadlock under +certain conditions. + +A DMB instruction at the start of every NEON function ensures that +the integer store buffer is always empty before executing any NEON +store, thus avoiding the deadlock condition. + +See ARM Cortex-A8 Errata Notice (PR120-PRDC-008070) for full details. +--- + +diff --git b/mythtv/libs/libavcodec/armv4l/dsputil_neon.c b/mythtv/libs/libavcodec/armv4l/dsputil_neon.c +index fa0602d..4fbadfc 100644 +--- b/mythtv/libs/libavcodec/armv4l/dsputil_neon.c ++++ b/mythtv/libs/libavcodec/armv4l/dsputil_neon.c +@@ -28,6 +28,7 @@ extern void ff_put_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, int stride, + int h, int x, int y); + + #define PUT_PIXELS_16_X2(vhadd) \ ++ "dmb \n\t" \ + "1: \n\t" \ + "vld1.64 {d0,d1,d2}, [%[p]], %[line_size] \n\t" \ + "vld1.64 {d4,d5,d6}, [%[p]], %[line_size] \n\t" \ +@@ -46,6 +47,7 @@ extern void ff_put_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, int stride, + "lsl %[l2], %[line_size], #1 \n\t" \ + "vld1.64 {d0,d1}, [%[p0]], %[l2] \n\t" \ + "vld1.64 {d2,d3}, [%[p1]], %[l2] \n\t" \ ++ "dmb \n\t" \ + "1: \n\t" \ + "subs %[h], %[h], #2 \n\t" \ + vhadd".u8 q2, q0, q1 \n\t" \ +@@ -69,6 +71,7 @@ extern void ff_put_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, int stride, + "vaddl.u8 q10, d1, d3 \n\t" \ + "vaddl.u8 q9, d4, d6 \n\t" \ + "vaddl.u8 q11, d5, d7 \n\t" \ ++ "dmb \n\t" \ + "1: \n\t" \ + "subs %[h], %[h], #2 \n\t" \ + "vld1.64 {d0,d1,d2}, [%[p0]], %[l2] \n\t" \ +@@ -98,6 +101,7 @@ extern void ff_put_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, int stride, + "bgt 1b \n\t" + + #define PUT_PIXELS_8_X2(vhadd) \ ++ "dmb \n\t" \ + "1: \n\t" \ + "vld1.64 {d0,d1}, [%[p]], %[line_size] \n\t" \ + "vld1.64 {d2,d3}, [%[p]], %[line_size] \n\t" \ +@@ -116,6 +120,7 @@ extern void ff_put_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, int stride, + "lsl %[l2], %[line_size], #1 \n\t" \ + "vld1.64 {d0}, [%[p0]], %[l2] \n\t" \ + "vld1.64 {d1}, [%[p1]], %[l2] \n\t" \ ++ "dmb \n\t" \ + "1: \n\t" \ + "subs %[h], %[h], #2 \n\t" \ + vhadd".u8 d4, d0, d1 \n\t" \ +@@ -137,6 +142,7 @@ extern void ff_put_h264_chroma_mc8_neon(uint8_t *dst, uint8_t *src, int stride, + "vext.8 d6, d2, d3, #1 \n\t" \ + "vaddl.u8 q8, d0, d4 \n\t" \ + "vaddl.u8 q9, d2, d6 \n\t" \ ++ "dmb \n\t" \ + "1: \n\t" \ + "subs %[h], %[h], #2 \n\t" \ + "vld1.64 {d0,d1}, [%[p0]], %[l2] \n\t" \ +@@ -161,6 +167,7 @@ static void put_pixels16_neon(uint8_t *block, const uint8_t *pixels, + int line_size, int h) + { + asm volatile( ++ "dmb \n\t" + "1: \n\t" + "vld1.64 {d0,d1}, [%[pixels]], %[line_size] \n\t" + "vld1.64 {d2,d3}, [%[pixels]], %[line_size] \n\t" +@@ -224,6 +231,7 @@ static void put_pixels8_neon(uint8_t *block, const uint8_t *pixels, + int line_size, int h) + { + asm volatile( ++ "dmb \n\t" + "1: \n\t" + "vld1.64 {d0}, [%[p]], %[line_size] \n\t" + "vld1.64 {d1}, [%[p]], %[line_size] \n\t" +diff --git b/mythtv/libs/libavcodec/armv4l/h264dsp_neon.S b/mythtv/libs/libavcodec/armv4l/h264dsp_neon.S +index a766867..8171ee2 100644 +--- b/mythtv/libs/libavcodec/armv4l/h264dsp_neon.S ++++ b/mythtv/libs/libavcodec/armv4l/h264dsp_neon.S +@@ -40,6 +40,8 @@ ff_put_h264_chroma_mc8_neon: + sub r4, r4, r5, lsl #3 + add r4, r4, #64 + ++ dmb ++ + beq 2f + + add r5, r1, r2 +diff --git b/mythtv/libs/libavcodec/armv4l/simple_idct_neon.S b/mythtv/libs/libavcodec/armv4l/simple_idct_neon.S +index 943e04f..abda6b2 100644 +--- b/mythtv/libs/libavcodec/armv4l/simple_idct_neon.S ++++ b/mythtv/libs/libavcodec/armv4l/simple_idct_neon.S +@@ -307,9 +307,10 @@ idct_col4_st8: + const: .short W1, W2, W3, W4, W5, W6, W7, W4c + + .macro idct_start data ++ push {v1-v3, lr} + pld [\data] + pld [\data, #64] +- push {v1-v3, lr} ++ dmb + vpush {d8-d15} + adr a4, const + vld1.64 {d0,d1}, [a4,:128] |