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qemu/hw/pl110.c
Peter Maydell 128939a954 hw/pl110.c: Add post-load hook to invalidate display 
Add a post-load hook which invalidates the display. In particular, if we
don't do this and the display size we've just reloaded is larger than
the default then we will segfault trying to read off the end of the buffer.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2012-01-04 10:32:16 +00:00

504 lines
12 KiB
C
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/*
* Arm PrimeCell PL110 Color LCD Controller
*
* Copyright (c) 2005-2009 CodeSourcery.
* Written by Paul Brook
*
* This code is licensed under the GNU LGPL
*/
#include "sysbus.h"
#include "console.h"
#include "framebuffer.h"
#define PL110_CR_EN 0x001
#define PL110_CR_BGR 0x100
#define PL110_CR_BEBO 0x200
#define PL110_CR_BEPO 0x400
#define PL110_CR_PWR 0x800
enum pl110_bppmode
{
BPP_1,
BPP_2,
BPP_4,
BPP_8,
BPP_16,
BPP_32,
BPP_16_565, /* PL111 only */
BPP_12 /* PL111 only */
};
/* The Versatile/PB uses a slightly modified PL110 controller. */
enum pl110_version
{
PL110,
PL110_VERSATILE,
PL111
};
typedef struct {
SysBusDevice busdev;
MemoryRegion iomem;
DisplayState *ds;
int version;
uint32_t timing[4];
uint32_t cr;
uint32_t upbase;
uint32_t lpbase;
uint32_t int_status;
uint32_t int_mask;
int cols;
int rows;
enum pl110_bppmode bpp;
int invalidate;
uint32_t mux_ctrl;
uint32_t pallette[256];
uint32_t raw_pallette[128];
qemu_irq irq;
} pl110_state;
static int vmstate_pl110_post_load(void *opaque, int version_id);
static const VMStateDescription vmstate_pl110 = {
.name = "pl110",
.version_id = 2,
.minimum_version_id = 1,
.post_load = vmstate_pl110_post_load,
.fields = (VMStateField[]) {
VMSTATE_INT32(version, pl110_state),
VMSTATE_UINT32_ARRAY(timing, pl110_state, 4),
VMSTATE_UINT32(cr, pl110_state),
VMSTATE_UINT32(upbase, pl110_state),
VMSTATE_UINT32(lpbase, pl110_state),
VMSTATE_UINT32(int_status, pl110_state),
VMSTATE_UINT32(int_mask, pl110_state),
VMSTATE_INT32(cols, pl110_state),
VMSTATE_INT32(rows, pl110_state),
VMSTATE_UINT32(bpp, pl110_state),
VMSTATE_INT32(invalidate, pl110_state),
VMSTATE_UINT32_ARRAY(pallette, pl110_state, 256),
VMSTATE_UINT32_ARRAY(raw_pallette, pl110_state, 128),
VMSTATE_UINT32_V(mux_ctrl, pl110_state, 2),
VMSTATE_END_OF_LIST()
}
};
static const unsigned char pl110_id[] =
{ 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
/* The Arm documentation (DDI0224C) says the CLDC on the Versatile board
has a different ID. However Linux only looks for the normal ID. */
#if 0
static const unsigned char pl110_versatile_id[] =
{ 0x93, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
#else
#define pl110_versatile_id pl110_id
#endif
static const unsigned char pl111_id[] = {
0x11, 0x11, 0x24, 0x00, 0x0d, 0xf0, 0x05, 0xb1
};
/* Indexed by pl110_version */
static const unsigned char *idregs[] = {
pl110_id,
pl110_versatile_id,
pl111_id
};
#include "pixel_ops.h"
#define BITS 8
#include "pl110_template.h"
#define BITS 15
#include "pl110_template.h"
#define BITS 16
#include "pl110_template.h"
#define BITS 24
#include "pl110_template.h"
#define BITS 32
#include "pl110_template.h"
static int pl110_enabled(pl110_state *s)
{
return (s->cr & PL110_CR_EN) && (s->cr & PL110_CR_PWR);
}
static void pl110_update_display(void *opaque)
{
pl110_state *s = (pl110_state *)opaque;
drawfn* fntable;
drawfn fn;
int dest_width;
int src_width;
int bpp_offset;
int first;
int last;
if (!pl110_enabled(s))
return;
switch (ds_get_bits_per_pixel(s->ds)) {
case 0:
return;
case 8:
fntable = pl110_draw_fn_8;
dest_width = 1;
break;
case 15:
fntable = pl110_draw_fn_15;
dest_width = 2;
break;
case 16:
fntable = pl110_draw_fn_16;
dest_width = 2;
break;
case 24:
fntable = pl110_draw_fn_24;
dest_width = 3;
break;
case 32:
fntable = pl110_draw_fn_32;
dest_width = 4;
break;
default:
fprintf(stderr, "pl110: Bad color depth\n");
exit(1);
}
if (s->cr & PL110_CR_BGR)
bpp_offset = 0;
else
bpp_offset = 24;
if ((s->version != PL111) && (s->bpp == BPP_16)) {
/* The PL110's native 16 bit mode is 5551; however
* most boards with a PL110 implement an external
* mux which allows bits to be reshuffled to give
* 565 format. The mux is typically controlled by
* an external system register.
* This is controlled by a GPIO input pin
* so boards can wire it up to their register.
*
* The PL111 straightforwardly implements both
* 5551 and 565 under control of the bpp field
* in the LCDControl register.
*/
switch (s->mux_ctrl) {
case 3: /* 565 BGR */
bpp_offset = (BPP_16_565 - BPP_16);
break;
case 1: /* 5551 */
break;
case 0: /* 888; also if we have loaded vmstate from an old version */
case 2: /* 565 RGB */
default:
/* treat as 565 but honour BGR bit */
bpp_offset += (BPP_16_565 - BPP_16);
break;
}
}
if (s->cr & PL110_CR_BEBO)
fn = fntable[s->bpp + 8 + bpp_offset];
else if (s->cr & PL110_CR_BEPO)
fn = fntable[s->bpp + 16 + bpp_offset];
else
fn = fntable[s->bpp + bpp_offset];
src_width = s->cols;
switch (s->bpp) {
case BPP_1:
src_width >>= 3;
break;
case BPP_2:
src_width >>= 2;
break;
case BPP_4:
src_width >>= 1;
break;
case BPP_8:
break;
case BPP_16:
case BPP_16_565:
case BPP_12:
src_width <<= 1;
break;
case BPP_32:
src_width <<= 2;
break;
}
dest_width *= s->cols;
first = 0;
framebuffer_update_display(s->ds, sysbus_address_space(&s->busdev),
s->upbase, s->cols, s->rows,
src_width, dest_width, 0,
s->invalidate,
fn, s->pallette,
&first, &last);
if (first >= 0) {
dpy_update(s->ds, 0, first, s->cols, last - first + 1);
}
s->invalidate = 0;
}
static void pl110_invalidate_display(void * opaque)
{
pl110_state *s = (pl110_state *)opaque;
s->invalidate = 1;
if (pl110_enabled(s)) {
qemu_console_resize(s->ds, s->cols, s->rows);
}
}
static void pl110_update_pallette(pl110_state *s, int n)
{
int i;
uint32_t raw;
unsigned int r, g, b;
raw = s->raw_pallette[n];
n <<= 1;
for (i = 0; i < 2; i++) {
r = (raw & 0x1f) << 3;
raw >>= 5;
g = (raw & 0x1f) << 3;
raw >>= 5;
b = (raw & 0x1f) << 3;
/* The I bit is ignored. */
raw >>= 6;
switch (ds_get_bits_per_pixel(s->ds)) {
case 8:
s->pallette[n] = rgb_to_pixel8(r, g, b);
break;
case 15:
s->pallette[n] = rgb_to_pixel15(r, g, b);
break;
case 16:
s->pallette[n] = rgb_to_pixel16(r, g, b);
break;
case 24:
case 32:
s->pallette[n] = rgb_to_pixel32(r, g, b);
break;
}
n++;
}
}
static void pl110_resize(pl110_state *s, int width, int height)
{
if (width != s->cols || height != s->rows) {
if (pl110_enabled(s)) {
qemu_console_resize(s->ds, width, height);
}
}
s->cols = width;
s->rows = height;
}
/* Update interrupts. */
static void pl110_update(pl110_state *s)
{
/* TODO: Implement interrupts. */
}
static uint64_t pl110_read(void *opaque, target_phys_addr_t offset,
unsigned size)
{
pl110_state *s = (pl110_state *)opaque;
if (offset >= 0xfe0 && offset < 0x1000) {
return idregs[s->version][(offset - 0xfe0) >> 2];
}
if (offset >= 0x200 && offset < 0x400) {
return s->raw_pallette[(offset - 0x200) >> 2];
}
switch (offset >> 2) {
case 0: /* LCDTiming0 */
return s->timing[0];
case 1: /* LCDTiming1 */
return s->timing[1];
case 2: /* LCDTiming2 */
return s->timing[2];
case 3: /* LCDTiming3 */
return s->timing[3];
case 4: /* LCDUPBASE */
return s->upbase;
case 5: /* LCDLPBASE */
return s->lpbase;
case 6: /* LCDIMSC */
if (s->version != PL110) {
return s->cr;
}
return s->int_mask;
case 7: /* LCDControl */
if (s->version != PL110) {
return s->int_mask;
}
return s->cr;
case 8: /* LCDRIS */
return s->int_status;
case 9: /* LCDMIS */
return s->int_status & s->int_mask;
case 11: /* LCDUPCURR */
/* TODO: Implement vertical refresh. */
return s->upbase;
case 12: /* LCDLPCURR */
return s->lpbase;
default:
hw_error("pl110_read: Bad offset %x\n", (int)offset);
return 0;
}
}
static void pl110_write(void *opaque, target_phys_addr_t offset,
uint64_t val, unsigned size)
{
pl110_state *s = (pl110_state *)opaque;
int n;
/* For simplicity invalidate the display whenever a control register
is written to. */
s->invalidate = 1;
if (offset >= 0x200 && offset < 0x400) {
/* Pallette. */
n = (offset - 0x200) >> 2;
s->raw_pallette[(offset - 0x200) >> 2] = val;
pl110_update_pallette(s, n);
return;
}
switch (offset >> 2) {
case 0: /* LCDTiming0 */
s->timing[0] = val;
n = ((val & 0xfc) + 4) * 4;
pl110_resize(s, n, s->rows);
break;
case 1: /* LCDTiming1 */
s->timing[1] = val;
n = (val & 0x3ff) + 1;
pl110_resize(s, s->cols, n);
break;
case 2: /* LCDTiming2 */
s->timing[2] = val;
break;
case 3: /* LCDTiming3 */
s->timing[3] = val;
break;
case 4: /* LCDUPBASE */
s->upbase = val;
break;
case 5: /* LCDLPBASE */
s->lpbase = val;
break;
case 6: /* LCDIMSC */
if (s->version != PL110) {
goto control;
}
imsc:
s->int_mask = val;
pl110_update(s);
break;
case 7: /* LCDControl */
if (s->version != PL110) {
goto imsc;
}
control:
s->cr = val;
s->bpp = (val >> 1) & 7;
if (pl110_enabled(s)) {
qemu_console_resize(s->ds, s->cols, s->rows);
}
break;
case 10: /* LCDICR */
s->int_status &= ~val;
pl110_update(s);
break;
default:
hw_error("pl110_write: Bad offset %x\n", (int)offset);
}
}
static const MemoryRegionOps pl110_ops = {
.read = pl110_read,
.write = pl110_write,
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void pl110_mux_ctrl_set(void *opaque, int line, int level)
{
pl110_state *s = (pl110_state *)opaque;
s->mux_ctrl = level;
}
static int vmstate_pl110_post_load(void *opaque, int version_id)
{
pl110_state *s = opaque;
/* Make sure we redraw, and at the right size */
pl110_invalidate_display(s);
return 0;
}
static int pl110_init(SysBusDevice *dev)
{
pl110_state *s = FROM_SYSBUS(pl110_state, dev);
memory_region_init_io(&s->iomem, &pl110_ops, s, "pl110", 0x1000);
sysbus_init_mmio(dev, &s->iomem);
sysbus_init_irq(dev, &s->irq);
qdev_init_gpio_in(&s->busdev.qdev, pl110_mux_ctrl_set, 1);
s->ds = graphic_console_init(pl110_update_display,
pl110_invalidate_display,
NULL, NULL, s);
return 0;
}
static int pl110_versatile_init(SysBusDevice *dev)
{
pl110_state *s = FROM_SYSBUS(pl110_state, dev);
s->version = PL110_VERSATILE;
return pl110_init(dev);
}
static int pl111_init(SysBusDevice *dev)
{
pl110_state *s = FROM_SYSBUS(pl110_state, dev);
s->version = PL111;
return pl110_init(dev);
}
static SysBusDeviceInfo pl110_info = {
.init = pl110_init,
.qdev.name = "pl110",
.qdev.size = sizeof(pl110_state),
.qdev.vmsd = &vmstate_pl110,
.qdev.no_user = 1,
};
static SysBusDeviceInfo pl110_versatile_info = {
.init = pl110_versatile_init,
.qdev.name = "pl110_versatile",
.qdev.size = sizeof(pl110_state),
.qdev.vmsd = &vmstate_pl110,
.qdev.no_user = 1,
};
static SysBusDeviceInfo pl111_info = {
.init = pl111_init,
.qdev.name = "pl111",
.qdev.size = sizeof(pl110_state),
.qdev.vmsd = &vmstate_pl110,
.qdev.no_user = 1,
};
static void pl110_register_devices(void)
{
sysbus_register_withprop(&pl110_info);
sysbus_register_withprop(&pl110_versatile_info);
sysbus_register_withprop(&pl111_info);
}
device_init(pl110_register_devices)
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