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sm501: Fix support for non-zero frame buffer start address

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Display updates and drawing hardware cursor did not work when frame
buffer address was non-zero. Fix this by taking the frame buffer
address into account in these cases. This fixes screen dragging on
AmigaOS. Based on patch by Sebastian Bauer.

Signed-off-by: Sebastian Bauer <mail@sebastianbauer.info>
Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
BALATON Zoltan 2018-07-04 11:40:58 +02:00 committed by David Gibson
parent 06cb926aaa
commit 33159dd7ce
1 changed files with 16 additions and 3 deletions
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19
hw/display/sm501.c
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@ -586,6 +586,11 @@ static uint32_t get_local_mem_size_index(uint32_t size)
return index;
}
static ram_addr_t get_fb_addr(SM501State *s, int crt)
{
return (crt ? s->dc_crt_fb_addr : s->dc_panel_fb_addr) & 0x3FFFFF0;
}
static inline int get_width(SM501State *s, int crt)
{
int width = crt ? s->dc_crt_h_total : s->dc_panel_h_total;
@ -688,7 +693,8 @@ static inline void hwc_invalidate(SM501State *s, int crt)
start *= w * bpp;
end *= w * bpp;
memory_region_set_dirty(&s->local_mem_region, start, end - start);
memory_region_set_dirty(&s->local_mem_region,
get_fb_addr(s, crt) + start, end - start);
}
static void sm501_2d_operation(SM501State *s)
@ -1213,6 +1219,9 @@ static void sm501_disp_ctrl_write(void *opaque, hwaddr addr,
break;
case SM501_DC_PANEL_FB_ADDR:
s->dc_panel_fb_addr = value & 0x8FFFFFF0;
if (value & 0x8000000) {
qemu_log_mask(LOG_UNIMP, "Panel external memory not supported\n");
}
break;
case SM501_DC_PANEL_FB_OFFSET:
s->dc_panel_fb_offset = value & 0x3FF03FF0;
@ -1273,6 +1282,9 @@ static void sm501_disp_ctrl_write(void *opaque, hwaddr addr,
break;
case SM501_DC_CRT_FB_ADDR:
s->dc_crt_fb_addr = value & 0x8FFFFFF0;
if (value & 0x8000000) {
qemu_log_mask(LOG_UNIMP, "CRT external memory not supported\n");
}
break;
case SM501_DC_CRT_FB_OFFSET:
s->dc_crt_fb_offset = value & 0x3FF03FF0;
@ -1615,7 +1627,7 @@ static void sm501_update_display(void *opaque)
draw_hwc_line_func *draw_hwc_line = NULL;
int full_update = 0;
int y_start = -1;
ram_addr_t offset = 0;
ram_addr_t offset;
uint32_t *palette;
uint8_t hwc_palette[3 * 3];
uint8_t *hwc_src = NULL;
@ -1672,9 +1684,10 @@ static void sm501_update_display(void *opaque)
}
/* draw each line according to conditions */
offset = get_fb_addr(s, crt);
snap = memory_region_snapshot_and_clear_dirty(&s->local_mem_region,
offset, width * height * src_bpp, DIRTY_MEMORY_VGA);
for (y = 0, offset = 0; y < height; y++, offset += width * src_bpp) {
for (y = 0; y < height; y++, offset += width * src_bpp) {
int update, update_hwc;
/* check if hardware cursor is enabled and we're within its range */