58f6d82fc4
Behaviour of emulated devices should not depend on the endianness of the CPU, so avoid using the endian-dependent load and store functions in the PXA2xx and OMAP display devices. These devices are little endian when they do DMA access. (Since ARM softmmu is always compiled as little endian, this means that the endian-dependent load and store functions are always little endian, so this commit makes no functionally visible change.) Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: rewrote commit message] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
176 lines
4.9 KiB
C
176 lines
4.9 KiB
C
/*
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* QEMU OMAP LCD Emulator templates
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*
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* Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#if DEPTH == 8
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# define BPP 1
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# define PIXEL_TYPE uint8_t
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#elif DEPTH == 15 || DEPTH == 16
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# define BPP 2
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# define PIXEL_TYPE uint16_t
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#elif DEPTH == 32
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# define BPP 4
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# define PIXEL_TYPE uint32_t
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#else
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# error unsupport depth
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#endif
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/*
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* 2-bit colour
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*/
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static void glue(draw_line2_, DEPTH)(void *opaque,
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uint8_t *d, const uint8_t *s, int width, int deststep)
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{
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uint16_t *pal = opaque;
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uint8_t v, r, g, b;
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do {
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v = ldub_p((void *) s);
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r = (pal[v & 3] >> 4) & 0xf0;
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g = pal[v & 3] & 0xf0;
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b = (pal[v & 3] << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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d += BPP;
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v >>= 2;
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r = (pal[v & 3] >> 4) & 0xf0;
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g = pal[v & 3] & 0xf0;
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b = (pal[v & 3] << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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d += BPP;
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v >>= 2;
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r = (pal[v & 3] >> 4) & 0xf0;
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g = pal[v & 3] & 0xf0;
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b = (pal[v & 3] << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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d += BPP;
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v >>= 2;
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r = (pal[v & 3] >> 4) & 0xf0;
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g = pal[v & 3] & 0xf0;
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b = (pal[v & 3] << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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d += BPP;
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s ++;
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width -= 4;
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} while (width > 0);
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}
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/*
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* 4-bit colour
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*/
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static void glue(draw_line4_, DEPTH)(void *opaque,
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uint8_t *d, const uint8_t *s, int width, int deststep)
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{
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uint16_t *pal = opaque;
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uint8_t v, r, g, b;
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do {
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v = ldub_p((void *) s);
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r = (pal[v & 0xf] >> 4) & 0xf0;
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g = pal[v & 0xf] & 0xf0;
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b = (pal[v & 0xf] << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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d += BPP;
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v >>= 4;
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r = (pal[v & 0xf] >> 4) & 0xf0;
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g = pal[v & 0xf] & 0xf0;
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b = (pal[v & 0xf] << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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d += BPP;
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s ++;
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width -= 2;
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} while (width > 0);
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}
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/*
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* 8-bit colour
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*/
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static void glue(draw_line8_, DEPTH)(void *opaque,
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uint8_t *d, const uint8_t *s, int width, int deststep)
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{
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uint16_t *pal = opaque;
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uint8_t v, r, g, b;
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do {
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v = ldub_p((void *) s);
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r = (pal[v] >> 4) & 0xf0;
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g = pal[v] & 0xf0;
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b = (pal[v] << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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s ++;
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d += BPP;
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} while (-- width != 0);
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}
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/*
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* 12-bit colour
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*/
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static void glue(draw_line12_, DEPTH)(void *opaque,
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uint8_t *d, const uint8_t *s, int width, int deststep)
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{
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uint16_t v;
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uint8_t r, g, b;
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do {
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v = lduw_le_p((void *) s);
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r = (v >> 4) & 0xf0;
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g = v & 0xf0;
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b = (v << 4) & 0xf0;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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s += 2;
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d += BPP;
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} while (-- width != 0);
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}
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/*
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* 16-bit colour
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*/
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static void glue(draw_line16_, DEPTH)(void *opaque,
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uint8_t *d, const uint8_t *s, int width, int deststep)
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{
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#if DEPTH == 16 && defined(HOST_WORDS_BIGENDIAN) == defined(TARGET_WORDS_BIGENDIAN)
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memcpy(d, s, width * 2);
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#else
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uint16_t v;
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uint8_t r, g, b;
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do {
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v = lduw_le_p((void *) s);
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r = (v >> 8) & 0xf8;
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g = (v >> 3) & 0xfc;
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b = (v << 3) & 0xf8;
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((PIXEL_TYPE *) d)[0] = glue(rgb_to_pixel, DEPTH)(r, g, b);
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s += 2;
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d += BPP;
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} while (-- width != 0);
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#endif
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}
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#undef DEPTH
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#undef BPP
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#undef PIXEL_TYPE
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