Arm display emulation.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1746 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 393 insertions, 0 deletions

diff --git a/hw/pl110.c b/hw/pl110.c
new file mode 100644
index 0000000000..8a4d5807af
--- /dev/null
+++ b/hw/pl110.c
@@ -0,0 +1,393 @@
+/* 
+ * Arm PrimeCell PL110 Color LCD Controller
+ *
+ * Copyright (c) 2005 CodeSourcery, LLC.
+ * Written by Paul Brook
+ *
+ * This code is licenced under the GNU LGPL
+ */
+
+#include "vl.h"
+
+#define PL110_CR_EN   0x001
+#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
+};
+
+typedef struct {
+    uint32_t base;
+    DisplayState *ds;
+    void *pic;
+    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 pallette[256];
+    uint32_t raw_pallette[128];
+    int irq;
+} pl110_state;
+
+static const unsigned char pl110_id[] =
+{ 0x10, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
+
+static inline uint32_t rgb_to_pixel8(unsigned int r, unsigned int g, unsigned b)
+{
+    return ((r >> 5) << 5) | ((g >> 5) << 2) | (b >> 6);
+}
+
+static inline uint32_t rgb_to_pixel15(unsigned int r, unsigned int g, unsigned b)
+{
+    return ((r >> 3) << 10) | ((g >> 3) << 5) | (b >> 3);
+}
+
+static inline uint32_t rgb_to_pixel16(unsigned int r, unsigned int g, unsigned b)
+{
+    return ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
+}
+
+static inline uint32_t rgb_to_pixel24(unsigned int r, unsigned int g, unsigned b)
+{
+    return (r << 16) | (g << 8) | b;
+}
+
+static inline uint32_t rgb_to_pixel32(unsigned int r, unsigned int g, unsigned b)
+{
+    return (r << 16) | (g << 8) | b;
+}
+
+typedef void (*drawfn)(uint32_t *, uint8_t *, const uint8_t *, int);
+
+#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);
+}
+
+void pl110_update_display(void *opaque)
+{
+    pl110_state *s = (pl110_state *)opaque;
+    drawfn* fntable;
+    drawfn fn;
+    uint32_t *pallette;
+    uint32_t addr;
+    uint32_t base;
+    int dest_width;
+    int src_width;
+    uint8_t *dest;
+    uint8_t *src;
+    int first, last;
+    int dirty, new_dirty;
+    int i;
+
+    if (!pl110_enabled(s))
+        return;
+    
+    switch (s->ds->depth) {
+    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, "qemu: Bad color depth\n");
+        exit(1);
+    }
+    if (s->cr & PL110_CR_BEBO)
+      fn = fntable[s->bpp + 6];
+    else if (s->cr & PL110_CR_BEPO)
+      fn = fntable[s->bpp + 12];
+    else
+      fn = fntable[s->bpp];
+    
+    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:
+        src_width <<= 1;
+        break;
+    case BPP_32:
+        src_width <<= 2;
+        break;
+    }
+    dest_width *= s->cols;
+    pallette = s->pallette;
+    base = s->upbase;
+    /* HACK: Arm aliases physical memory at 0x80000000.  */
+    if (base > 0x80000000)
+        base -= 0x80000000;
+    src = phys_ram_base + base;
+    dest = s->ds->data;
+    first = -1;
+    addr = base;
+
+    dirty = cpu_physical_memory_get_dirty(addr, VGA_DIRTY_FLAG);
+    for (i = 0; i < s->rows; i++) {
+        new_dirty = 0;
+        if ((addr & TARGET_PAGE_MASK) + src_width >= TARGET_PAGE_SIZE) {
+            uint32_t tmp;
+            for (tmp = 0; tmp < src_width; tmp += TARGET_PAGE_SIZE) {
+                new_dirty |= cpu_physical_memory_get_dirty(addr + tmp,
+                                                           VGA_DIRTY_FLAG);
+            }
+        }
+
+        if (dirty || new_dirty || s->invalidate) {
+            fn(pallette, dest, src, s->cols);
+            if (first == -1)
+                first = i;
+            last = i;
+        }
+        dirty = new_dirty;
+        addr += src_width;
+        dest += dest_width;
+        src += src_width;
+    }
+    if (first < 0)
+      return;
+
+    s->invalidate = 0;
+    cpu_physical_memory_reset_dirty(base + first * src_width,
+                                    base + (last + 1) * src_width,
+                                    VGA_DIRTY_FLAG);
+    dpy_update(s->ds, 0, first, s->cols, last - first + 1);
+}
+
+void pl110_invalidate_display(void * opaque)
+{
+    pl110_state *s = (pl110_state *)opaque;
+    s->invalidate = 1;
+}
+
+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 (s->ds->depth) {
+        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)) {
+            dpy_resize(s->ds, s->cols, s->rows);
+        }
+    }
+    s->cols = width;
+    s->rows = height;
+}
+
+/* Update interrupts.  */
+static void pl110_update(pl110_state *s)
+{
+  /* TODO: Implement interrupts.  */
+}
+
+static uint32_t pl110_read(void *opaque, target_phys_addr_t offset)
+{
+    pl110_state *s = (pl110_state *)opaque;
+
+    offset -= s->base;
+    if (offset >= 0xfe0 && offset < 0x1000) {
+        return pl110_id[(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 */
+        return s->int_mask;
+    case 7: /* LCDControl */
+        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:
+        cpu_abort (cpu_single_env, "pl110_read: Bad offset %x\n", offset);
+        return 0;
+    }
+}
+
+static void pl110_write(void *opaque, target_phys_addr_t offset,
+                        uint32_t val)
+{
+    pl110_state *s = (pl110_state *)opaque;
+    int n;
+
+    /* For simplicity invalidate the display whenever a control register
+       is writen to.  */
+    s->invalidate = 1;
+    offset -= s->base;
+    if (offset >= 0x200 && offset < 0x400) {
+        /* Pallette.  */
+        n = (offset - 0x200) >> 2;
+        s->raw_pallette[(offset - 0x200) >> 2] = val;
+        pl110_update_pallette(s, n);
+    }
+    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 */
+        s->int_mask = val;
+        pl110_update(s);
+        break;
+    case 7: /* LCDControl */
+        s->cr = val;
+        s->bpp = (val >> 1) & 7;
+        if (pl110_enabled(s)) {
+            dpy_resize(s->ds, s->cols, s->rows);
+        }
+        break;
+    case 10: /* LCDICR */
+        s->int_status &= ~val;
+        pl110_update(s);
+        break;
+    default:
+        cpu_abort (cpu_single_env, "pl110_write: Bad offset %x\n", offset);
+    }
+}
+
+static CPUReadMemoryFunc *pl110_readfn[] = {
+   pl110_read,
+   pl110_read,
+   pl110_read
+};
+
+static CPUWriteMemoryFunc *pl110_writefn[] = {
+   pl110_write,
+   pl110_write,
+   pl110_write
+};
+
+void *pl110_init(DisplayState *ds, uint32_t base, void *pic, int irq)
+{
+    pl110_state *s;
+    int iomemtype;
+
+    s = (pl110_state *)qemu_mallocz(sizeof(pl110_state));
+    iomemtype = cpu_register_io_memory(0, pl110_readfn,
+                                       pl110_writefn, s);
+    cpu_register_physical_memory(base, 0x007fffff, iomemtype);
+    s->base = base;
+    s->ds = ds;
+    s->pic = pic;
+    s->irq = irq;
+    /* ??? Save/restore.  */
+    return s;
+}