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Use DMA mapping API. Signed-off-by: Paul Brook <paul@codesourcery.com> git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6965 c046a42c-6fe2-441c-8c8c-71466251a162stable-0.11
pbrook
17 years ago
10 changed files with 253 additions and 231 deletions
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/*
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* Framebuffer device helper routines |
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* |
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* Copyright (c) 2009 CodeSourcery |
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* Written by Paul Brook <paul@codesourcery.com> |
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* |
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* This code is licensed under the GNU GPLv2. |
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*/ |
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/* TODO:
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- Do something similar for framebuffers with local ram |
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- Handle rotation here instead of hacking dest_pitch |
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- Use common pixel conversion routines instead of per-device drawfn |
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- Remove all DisplayState knowledge from devices. |
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*/ |
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#include "hw.h" |
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#include "console.h" |
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#include "framebuffer.h" |
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#include "kvm.h" |
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/* Render an image from a shared memory framebuffer. */ |
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void framebuffer_update_display( |
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DisplayState *ds, |
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target_phys_addr_t base, |
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int cols, /* Width in pixels. */ |
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int rows, /* Leight in pixels. */ |
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int src_width, /* Length of source line, in bytes. */ |
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int dest_row_pitch, /* Bytes between adjacent horizontal output pixels. */ |
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int dest_col_pitch, /* Bytes between adjacent vertical output pixels. */ |
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int invalidate, /* nonzero to redraw the whole image. */ |
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drawfn fn, |
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void *opaque, |
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int *first_row, /* Input and output. */ |
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int *last_row /* Output only */) |
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{ |
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target_phys_addr_t src_len; |
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uint8_t *dest; |
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uint8_t *src; |
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uint8_t *src_base; |
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int first, last = 0; |
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int dirty; |
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int i; |
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ram_addr_t addr; |
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ram_addr_t pd; |
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ram_addr_t pd2; |
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i = *first_row; |
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*first_row = -1; |
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src_len = src_width * rows; |
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if (kvm_enabled()) { |
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kvm_physical_sync_dirty_bitmap(base, src_len); |
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} |
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pd = cpu_get_physical_page_desc(base); |
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pd2 = cpu_get_physical_page_desc(base + src_len - 1); |
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/* We should reall check that this is a continuous ram region.
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Instead we just check that the first and last pages are |
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both ram, and the right distance apart. */ |
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if ((pd & ~TARGET_PAGE_MASK) > IO_MEM_ROM |
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|| (pd2 & ~TARGET_PAGE_MASK) > IO_MEM_ROM) { |
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return; |
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} |
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pd = (pd & TARGET_PAGE_MASK) + (base & ~TARGET_PAGE_MASK); |
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if (((pd + src_len - 1) & TARGET_PAGE_MASK) != (pd2 & TARGET_PAGE_MASK)) { |
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return; |
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} |
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src_base = cpu_physical_memory_map(base, &src_len, 0); |
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/* If we can't map the framebuffer then bail. We could try harder,
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but it's not really worth it as dirty flag tracking will probably |
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already have failed above. */ |
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if (!src_base) |
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return; |
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if (src_len != src_width * rows) { |
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cpu_physical_memory_unmap(src_base, src_len, 0, 0); |
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return; |
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} |
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src = src_base; |
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dest = ds_get_data(ds); |
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if (dest_col_pitch < 0) |
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dest -= dest_col_pitch * (cols - 1); |
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first = -1; |
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addr = pd; |
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addr += i * src_width; |
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src += i * src_width; |
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dest += i * dest_row_pitch; |
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for (; i < rows; i++) { |
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target_phys_addr_t dirty_offset; |
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dirty = 0; |
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dirty_offset = 0; |
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while (addr + dirty_offset < TARGET_PAGE_ALIGN(addr + src_width)) { |
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dirty |= cpu_physical_memory_get_dirty(addr + dirty_offset, |
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VGA_DIRTY_FLAG); |
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dirty_offset += TARGET_PAGE_SIZE; |
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} |
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if (dirty || invalidate) { |
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fn(opaque, dest, src, cols, dest_col_pitch); |
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if (first == -1) |
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first = i; |
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last = i; |
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} |
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addr += src_width; |
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src += src_width; |
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dest += dest_row_pitch; |
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} |
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cpu_physical_memory_unmap(src_base, src_len, 0, 0); |
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if (first < 0) { |
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return; |
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} |
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cpu_physical_memory_reset_dirty(pd, pd + src_len, VGA_DIRTY_FLAG); |
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*first_row = first; |
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*last_row = last; |
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return; |
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} |
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@ -0,0 +1,22 @@ |
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#ifndef QEMU_FRAMEBUFFER_H |
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#define QEMU_FRAMEBUFFER_H |
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/* Framebuffer device helper routines. */ |
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typedef void (*drawfn)(void *, uint8_t *, const uint8_t *, int, int); |
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void framebuffer_update_display( |
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DisplayState *ds, |
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target_phys_addr_t base, |
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int cols, |
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int rows, |
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int src_width, |
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int dest_row_pitch, |
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int dest_col_pitch, |
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int invalidate, |
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drawfn fn, |
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void *opaque, |
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int *first_row, |
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int *last_row); |
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#endif |
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