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[Qemu-devel] [PULL 4/7] vga: refactor vram_size clamping and rounding
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PULL 4/7] vga: refactor vram_size clamping and rounding |
Date: |
Wed, 4 Mar 2015 15:30:46 +0100 |
From: Radim Krčmář <address@hidden>
Make the code a bit more obvious.
We don't have min/max, so a general helper for clamp probably isn't
acceptable either.
Signed-off-by: Radim Krčmář <address@hidden>
Signed-off-by: Gerd Hoffmann <address@hidden>
---
hw/display/vga.c | 22 +++++++++++++++-------
1 file changed, 15 insertions(+), 7 deletions(-)
diff --git a/hw/display/vga.c b/hw/display/vga.c
index 6e4ca7e..c0f7b34 100644
--- a/hw/display/vga.c
+++ b/hw/display/vga.c
@@ -2094,6 +2094,17 @@ static const GraphicHwOps vga_ops = {
.text_update = vga_update_text,
};
+static inline uint32_t uint_clamp(uint32_t val, uint32_t vmin, uint32_t vmax)
+{
+ if (val < vmin) {
+ return vmin;
+ }
+ if (val > vmax) {
+ return vmax;
+ }
+ return val;
+}
+
void vga_common_init(VGACommonState *s, Object *obj, bool global_vmstate)
{
int i, j, v, b;
@@ -2121,13 +2132,10 @@ void vga_common_init(VGACommonState *s, Object *obj,
bool global_vmstate)
expand4to8[i] = v;
}
- /* valid range: 1 MB -> 512 MB */
- s->vram_size = 1024 * 1024;
- while (s->vram_size < (s->vram_size_mb << 20) &&
- s->vram_size < (512 << 20)) {
- s->vram_size <<= 1;
- }
- s->vram_size_mb = s->vram_size >> 20;
+ s->vram_size_mb = uint_clamp(s->vram_size_mb, 1, 512);
+ s->vram_size_mb = pow2ceil(s->vram_size_mb);
+ s->vram_size = s->vram_size_mb << 20;
+
if (!s->vbe_size) {
s->vbe_size = s->vram_size;
}
--
1.8.3.1
- [Qemu-devel] [PULL 3/7] qxl: refactor rounding up to a nearest power of 2, (continued)
- [Qemu-devel] [PULL 3/7] qxl: refactor rounding up to a nearest power of 2, Gerd Hoffmann, 2015/03/04
- [Qemu-devel] [PULL 1/7] qxl: document minimal video memory for new modes, Gerd Hoffmann, 2015/03/04
- [Qemu-devel] [PULL 7/7] hmp: info spice: take out webdav, Gerd Hoffmann, 2015/03/04
- [Qemu-devel] [PULL 2/7] spice: fix invalid memory access to vga.vram, Gerd Hoffmann, 2015/03/04
- [Qemu-devel] [PULL 5/7] qxl: drop update_displaychangelistener call for secondary qxl devices, Gerd Hoffmann, 2015/03/04
- [Qemu-devel] [PULL 4/7] vga: refactor vram_size clamping and rounding,
Gerd Hoffmann <=
- [Qemu-devel] [PULL 6/7] hmp: info spice: Show string channel name, Gerd Hoffmann, 2015/03/04
- Re: [Qemu-devel] [PULL 0/7] spice patch queue, Peter Maydell, 2015/03/08