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qemu-linux-user
0163-qemu-VGA-endian-swap-low-level-draw.patch
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File 0163-qemu-VGA-endian-swap-low-level-draw.patch of Package qemu-linux-user
From 785f9ec562f876b745c0ff2944ab9f5ec39d44ce Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt <benh@kernel.crashing.org> Date: Tue, 17 Jun 2014 14:59:44 +1000 Subject: [PATCH] qemu VGA endian swap low level drawing changes On Tue, 2014-06-17 at 06:40 +0200, Paolo Bonzini wrote: > Il 17/06/2014 05:07, Benjamin Herrenschmidt ha scritto: > > I've come up with the proof of concept below which changes the various > > line drawing functions in vga-template to select the right ld/st > > function. However that adds a per-line test (overhead I can hear some > > people shouting ! :-). > > Sounds perfectly reasonable. Thanks. I've tried the other approach of adding new functions which means no overhead (hopefully) for the non-swap case and less invasive changes to vga_template.c. Patch below. What do you think ? This or the previous approach ? Then we can discuss how we actually trigger the endian change and where we store the state :-) Posted-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Alexander Graf <agraf@suse.de> --- hw/display/vga.c | 196 +++++++++++++++++++++++++++++++++++----------- hw/display/vga_int.h | 3 + hw/display/vga_template.h | 52 ++++++++---- hw/ppc/spapr.c | 3 + hw/ppc/spapr_hcall.c | 4 + 5 files changed, 197 insertions(+), 61 deletions(-) diff --git a/hw/display/vga.c b/hw/display/vga.c index 063319d..5b968b9 100644 --- a/hw/display/vga.c +++ b/hw/display/vga.c @@ -979,27 +979,89 @@ typedef void vga_draw_glyph9_func(uint8_t *d, int linesize, typedef void vga_draw_line_func(VGACommonState *s1, uint8_t *d, const uint8_t *s, int width); +#ifdef TARGET_WORDS_BIGENDIAN +static bool vga_is_be = true; +#else +static bool vga_is_be = false; +#endif + +void vga_set_big_endian(bool be) +{ + vga_is_be = be; +} + +static inline bool vga_is_big_endian(VGACommonState *s) +{ + return vga_is_be; +} + +#define BGR_FORMAT 0 +#define PIX_BE 0 #define DEPTH 8 #include "vga_template.h" +#define BGR_FORMAT 0 +#define PIX_BE 0 #define DEPTH 15 #include "vga_template.h" -#define BGR_FORMAT +#define BGR_FORMAT 1 +#define PIX_BE 0 #define DEPTH 15 #include "vga_template.h" +#define BGR_FORMAT 0 +#define PIX_BE 0 #define DEPTH 16 #include "vga_template.h" -#define BGR_FORMAT +#define BGR_FORMAT 1 +#define PIX_BE 0 #define DEPTH 16 #include "vga_template.h" +#define BGR_FORMAT 0 +#define PIX_BE 0 #define DEPTH 32 #include "vga_template.h" -#define BGR_FORMAT +#define BGR_FORMAT 1 +#define PIX_BE 0 +#define DEPTH 32 +#include "vga_template.h" + +#define BGR_FORMAT 0 +#define PIX_BE 1 +#define DEPTH 8 +#include "vga_template.h" + +#define BGR_FORMAT 0 +#define PIX_BE 1 +#define DEPTH 15 +#include "vga_template.h" + +#define BGR_FORMAT 1 +#define PIX_BE 1 +#define DEPTH 15 +#include "vga_template.h" + +#define BGR_FORMAT 0 +#define PIX_BE 1 +#define DEPTH 16 +#include "vga_template.h" + +#define BGR_FORMAT 1 +#define PIX_BE 1 +#define DEPTH 16 +#include "vga_template.h" + +#define BGR_FORMAT 0 +#define PIX_BE 1 +#define DEPTH 32 +#include "vga_template.h" + +#define BGR_FORMAT 1 +#define PIX_BE 1 #define DEPTH 32 #include "vga_template.h" @@ -1482,10 +1544,14 @@ enum { VGA_DRAW_LINE4D2, VGA_DRAW_LINE8D2, VGA_DRAW_LINE8, - VGA_DRAW_LINE15, - VGA_DRAW_LINE16, - VGA_DRAW_LINE24, - VGA_DRAW_LINE32, + VGA_DRAW_LINE15_LE, + VGA_DRAW_LINE16_LE, + VGA_DRAW_LINE24_LE, + VGA_DRAW_LINE32_LE, + VGA_DRAW_LINE15_BE, + VGA_DRAW_LINE16_BE, + VGA_DRAW_LINE24_BE, + VGA_DRAW_LINE32_BE, VGA_DRAW_LINE_NB, }; @@ -1538,37 +1604,69 @@ static vga_draw_line_func * const vga_draw_line_table[NB_DEPTHS * VGA_DRAW_LINE_ vga_draw_line8_16, vga_draw_line8_16, - vga_draw_line15_8, - vga_draw_line15_15, - vga_draw_line15_16, - vga_draw_line15_32, - vga_draw_line15_32bgr, - vga_draw_line15_15bgr, - vga_draw_line15_16bgr, - - vga_draw_line16_8, - vga_draw_line16_15, - vga_draw_line16_16, - vga_draw_line16_32, - vga_draw_line16_32bgr, - vga_draw_line16_15bgr, - vga_draw_line16_16bgr, - - vga_draw_line24_8, - vga_draw_line24_15, - vga_draw_line24_16, - vga_draw_line24_32, - vga_draw_line24_32bgr, - vga_draw_line24_15bgr, - vga_draw_line24_16bgr, - - vga_draw_line32_8, - vga_draw_line32_15, - vga_draw_line32_16, - vga_draw_line32_32, - vga_draw_line32_32bgr, - vga_draw_line32_15bgr, - vga_draw_line32_16bgr, + vga_draw_line15_8_le, + vga_draw_line15_15_le, + vga_draw_line15_16_le, + vga_draw_line15_32_le, + vga_draw_line15_32bgr_le, + vga_draw_line15_15bgr_le, + vga_draw_line15_16bgr_le, + + vga_draw_line16_8_le, + vga_draw_line16_15_le, + vga_draw_line16_16_le, + vga_draw_line16_32_le, + vga_draw_line16_32bgr_le, + vga_draw_line16_15bgr_le, + vga_draw_line16_16bgr_le, + + vga_draw_line24_8_le, + vga_draw_line24_15_le, + vga_draw_line24_16_le, + vga_draw_line24_32_le, + vga_draw_line24_32bgr_le, + vga_draw_line24_15bgr_le, + vga_draw_line24_16bgr_le, + + vga_draw_line32_8_le, + vga_draw_line32_15_le, + vga_draw_line32_16_le, + vga_draw_line32_32_le, + vga_draw_line32_32bgr_le, + vga_draw_line32_15bgr_le, + vga_draw_line32_16bgr_le, + + vga_draw_line15_8_be, + vga_draw_line15_15_be, + vga_draw_line15_16_be, + vga_draw_line15_32_be, + vga_draw_line15_32bgr_be, + vga_draw_line15_15bgr_be, + vga_draw_line15_16bgr_be, + + vga_draw_line16_8_be, + vga_draw_line16_15_be, + vga_draw_line16_16_be, + vga_draw_line16_32_be, + vga_draw_line16_32bgr_be, + vga_draw_line16_15bgr_be, + vga_draw_line16_16bgr_be, + + vga_draw_line24_8_be, + vga_draw_line24_15_be, + vga_draw_line24_16_be, + vga_draw_line24_32_be, + vga_draw_line24_32bgr_be, + vga_draw_line24_15bgr_be, + vga_draw_line24_16bgr_be, + + vga_draw_line32_8_be, + vga_draw_line32_15_be, + vga_draw_line32_16_be, + vga_draw_line32_32_be, + vga_draw_line32_32bgr_be, + vga_draw_line32_15bgr_be, + vga_draw_line32_16bgr_be, }; static int vga_get_bpp(VGACommonState *s) @@ -1641,10 +1739,14 @@ static void vga_draw_graphic(VGACommonState *s, int full_update) uint8_t *d; uint32_t v, addr1, addr; vga_draw_line_func *vga_draw_line; -#if defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN) - static const bool byteswap = false; + bool byteswap, is_be; + + is_be = vga_is_big_endian(s); + +#ifdef HOST_WORDS_BIGENDIAN + byteswap = !is_be; #else - static const bool byteswap = true; + byteswap = is_be; #endif full_update |= update_basic_params(s); @@ -1687,7 +1789,8 @@ static void vga_draw_graphic(VGACommonState *s, int full_update) if (s->line_offset != s->last_line_offset || disp_width != s->last_width || height != s->last_height || - s->last_depth != depth) { + s->last_depth != depth || + s->last_bswap != byteswap) { if (depth == 32 || (depth == 16 && !byteswap)) { surface = qemu_create_displaysurface_from(disp_width, height, depth, s->line_offset, @@ -1703,6 +1806,7 @@ static void vga_draw_graphic(VGACommonState *s, int full_update) s->last_height = height; s->last_line_offset = s->line_offset; s->last_depth = depth; + s->last_bswap = byteswap; full_update = 1; } else if (is_buffer_shared(surface) && (full_update || surface_data(surface) != s->vram_ptr @@ -1746,19 +1850,19 @@ static void vga_draw_graphic(VGACommonState *s, int full_update) bits = 8; break; case 15: - v = VGA_DRAW_LINE15; + v = is_be ? VGA_DRAW_LINE15_BE : VGA_DRAW_LINE15_LE; bits = 16; break; case 16: - v = VGA_DRAW_LINE16; + v = is_be ? VGA_DRAW_LINE16_BE : VGA_DRAW_LINE16_LE; bits = 16; break; case 24: - v = VGA_DRAW_LINE24; + v = is_be ? VGA_DRAW_LINE24_BE : VGA_DRAW_LINE24_LE; bits = 24; break; case 32: - v = VGA_DRAW_LINE32; + v = is_be ? VGA_DRAW_LINE32_BE : VGA_DRAW_LINE32_LE; bits = 32; break; } diff --git a/hw/display/vga_int.h b/hw/display/vga_int.h index e641890..c82c20d 100644 --- a/hw/display/vga_int.h +++ b/hw/display/vga_int.h @@ -146,6 +146,7 @@ typedef struct VGACommonState { uint32_t last_width, last_height; /* in chars or pixels */ uint32_t last_scr_width, last_scr_height; /* in pixels */ uint32_t last_depth; /* in bits */ + bool last_bswap; uint8_t cursor_start, cursor_end; bool cursor_visible_phase; int64_t cursor_blink_time; @@ -203,6 +204,8 @@ uint32_t vbe_ioport_read_data(void *opaque, uint32_t addr); void vbe_ioport_write_index(void *opaque, uint32_t addr, uint32_t val); void vbe_ioport_write_data(void *opaque, uint32_t addr, uint32_t val); +void vga_set_big_endian(bool be); + extern const uint8_t sr_mask[8]; extern const uint8_t gr_mask[16]; diff --git a/hw/display/vga_template.h b/hw/display/vga_template.h index 6cfae56..f8ea15f 100644 --- a/hw/display/vga_template.h +++ b/hw/display/vga_template.h @@ -35,13 +35,24 @@ #error unsupport depth #endif -#ifdef BGR_FORMAT -#define PIXEL_NAME glue(DEPTH, bgr) -#else +#if BGR_FORMAT +#if PIX_BE +#define PIXEL_FNAME glue(DEPTH,bgr_be) +#else /* PIX_BE */ +#define PIXEL_FNAME glue(DEPTH,bgr_le) +#endif /* PIX_BE */ +#define PIXEL_NAME glue(DEPTH,bgr) +#else /* BGR_FORMAT */ +#if PIX_BE +#define PIXEL_FNAME glue(DEPTH,_be) +#else /* PIX_BE */ +#define PIXEL_FNAME glue(DEPTH,_le) +#endif /* PIX_BE */ #define PIXEL_NAME DEPTH #endif /* BGR_FORMAT */ -#if DEPTH != 15 && !defined(BGR_FORMAT) + +#if DEPTH != 15 && !BGR_FORMAT && !PIX_BE static inline void glue(vga_draw_glyph_line_, DEPTH)(uint8_t *d, uint32_t font_data, @@ -350,10 +361,10 @@ static void glue(vga_draw_line8_, DEPTH)(VGACommonState *s1, uint8_t *d, /* * 15 bit color */ -static void glue(vga_draw_line15_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, +static void glue(vga_draw_line15_, PIXEL_FNAME)(VGACommonState *s1, uint8_t *d, const uint8_t *s, int width) { -#if DEPTH == 15 && defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN) +#if DEPTH == 15 && PIX_BE == defined(HOST_WORDS_BIGENDIAN) memcpy(d, s, width * 2); #else int w; @@ -361,7 +372,11 @@ static void glue(vga_draw_line15_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, w = width; do { - v = lduw_raw((void *)s); +#if PIX_BE + v = lduw_be_p((void *)s); +#else + v = lduw_le_p((void *)s); +#endif r = (v >> 7) & 0xf8; g = (v >> 2) & 0xf8; b = (v << 3) & 0xf8; @@ -375,10 +390,10 @@ static void glue(vga_draw_line15_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, /* * 16 bit color */ -static void glue(vga_draw_line16_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, +static void glue(vga_draw_line16_, PIXEL_FNAME)(VGACommonState *s1, uint8_t *d, const uint8_t *s, int width) { -#if DEPTH == 16 && defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN) +#if DEPTH == 16 && PIX_BE == defined(HOST_WORDS_BIGENDIAN) memcpy(d, s, width * 2); #else int w; @@ -386,7 +401,11 @@ static void glue(vga_draw_line16_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, w = width; do { - v = lduw_raw((void *)s); +#if PIX_BE + v = lduw_be_p((void *)s); +#else + v = lduw_le_p((void *)s); +#endif r = (v >> 8) & 0xf8; g = (v >> 3) & 0xfc; b = (v << 3) & 0xf8; @@ -400,7 +419,7 @@ static void glue(vga_draw_line16_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, /* * 24 bit color */ -static void glue(vga_draw_line24_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, +static void glue(vga_draw_line24_, PIXEL_FNAME)(VGACommonState *s1, uint8_t *d, const uint8_t *s, int width) { int w; @@ -408,7 +427,7 @@ static void glue(vga_draw_line24_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, w = width; do { -#if defined(TARGET_WORDS_BIGENDIAN) +#if PIX_BE r = s[0]; g = s[1]; b = s[2]; @@ -426,10 +445,10 @@ static void glue(vga_draw_line24_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, /* * 32 bit color */ -static void glue(vga_draw_line32_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, +static void glue(vga_draw_line32_, PIXEL_FNAME)(VGACommonState *s1, uint8_t *d, const uint8_t *s, int width) { -#if DEPTH == 32 && defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN) && !defined(BGR_FORMAT) +#if DEPTH == 32 && !BGR_FORMAT && PIX_BE == defined(HOST_WORDS_BIGENDIAN) memcpy(d, s, width * 4); #else int w; @@ -437,7 +456,7 @@ static void glue(vga_draw_line32_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, w = width; do { -#if defined(TARGET_WORDS_BIGENDIAN) +#if PIX_BE r = s[1]; g = s[2]; b = s[3]; @@ -458,4 +477,7 @@ static void glue(vga_draw_line32_, PIXEL_NAME)(VGACommonState *s1, uint8_t *d, #undef BPP #undef PIXEL_TYPE #undef PIXEL_NAME +#undef PIXEL_FNAME #undef BGR_FORMAT +#undef PIX_BE + diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 1b29e9c..1d092fd 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -829,6 +829,7 @@ static void spapr_reset_htab(sPAPREnvironment *spapr) } } +extern void vga_set_big_endian(bool trueis_be); static void ppc_spapr_reset(void) { PowerPCCPU *first_ppc_cpu; @@ -849,6 +850,8 @@ static void ppc_spapr_reset(void) first_cpu->halted = 0; first_ppc_cpu->env.nip = spapr->entry_point; + /* Restore VGA */ + vga_set_big_endian(true); } static void spapr_cpu_reset(void *opaque) diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c index 7952077..58f1f52 100644 --- a/hw/ppc/spapr_hcall.c +++ b/hw/ppc/spapr_hcall.c @@ -712,6 +712,8 @@ static target_ulong h_logical_dcbf(PowerPCCPU *cpu, sPAPREnvironment *spapr, return H_SUCCESS; } +extern void vga_set_big_endian(bool trueis_be); + static target_ulong h_set_mode_resouce_le(PowerPCCPU *cpu, target_ulong mflags, target_ulong value1, @@ -730,12 +732,14 @@ static target_ulong h_set_mode_resouce_le(PowerPCCPU *cpu, case H_SET_MODE_ENDIAN_BIG: CPU_FOREACH(cs) { set_spr(cs, SPR_LPCR, 0, LPCR_ILE); + vga_set_big_endian(true); } return H_SUCCESS; case H_SET_MODE_ENDIAN_LITTLE: CPU_FOREACH(cs) { set_spr(cs, SPR_LPCR, LPCR_ILE, LPCR_ILE); + vga_set_big_endian(false); } return H_SUCCESS; }
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