Archipelago » qemu

/*

 * Intel XScale PXA255/270 LCDC emulation.

 *

 * Copyright (c) 2006 Openedhand Ltd.

 * Written by Andrzej Zaborowski <balrog@zabor.org>

 *

 * This code is licensed under the GPLv2.

 */

#include "hw.h"

#include "console.h"

#include "pxa.h"

#include "pixel_ops.h"

/* FIXME: For graphic_rotate. Should probably be done in common code.  */

#include "sysemu.h"

typedef void (*drawfn)(uint32_t *, uint8_t *, const uint8_t *, int, int);

struct pxa2xx_lcdc_s {

    target_phys_addr_t base;

    qemu_irq irq;

    int irqlevel;

    int invalidated;

    DisplayState *ds;

    QEMUConsole *console;

    drawfn *line_fn[2];

    int dest_width;

    int xres, yres;

    int pal_for;

    int transp;

    enum {

        pxa_lcdc_2bpp = 1,

        pxa_lcdc_4bpp = 2,

        pxa_lcdc_8bpp = 3,

        pxa_lcdc_16bpp = 4,

        pxa_lcdc_18bpp = 5,

        pxa_lcdc_18pbpp = 6,

        pxa_lcdc_19bpp = 7,

        pxa_lcdc_19pbpp = 8,

        pxa_lcdc_24bpp = 9,

        pxa_lcdc_25bpp = 10,

    } bpp;

    uint32_t control[6];

    uint32_t status[2];

    uint32_t ovl1c[2];

    uint32_t ovl2c[2];

    uint32_t ccr;

    uint32_t cmdcr;

    uint32_t trgbr;

    uint32_t tcr;

    uint32_t liidr;

    uint8_t bscntr;

    struct {

        target_phys_addr_t branch;

        int up;

        uint8_t palette[1024];

        uint8_t pbuffer[1024];

        void (*redraw)(struct pxa2xx_lcdc_s *s, uint8_t *fb,

                        int *miny, int *maxy);

        target_phys_addr_t descriptor;

        target_phys_addr_t source;

        uint32_t id;

        uint32_t command;

    } dma_ch[7];

    qemu_irq vsync_cb;

    int orientation;

};

struct __attribute__ ((__packed__)) pxa_frame_descriptor_s {

    uint32_t fdaddr;

    uint32_t fsaddr;

    uint32_t fidr;

    uint32_t ldcmd;

};

#define LCCR0        0x000        /* LCD Controller Control register 0 */

#define LCCR1        0x004        /* LCD Controller Control register 1 */

#define LCCR2        0x008        /* LCD Controller Control register 2 */

#define LCCR3        0x00c        /* LCD Controller Control register 3 */

#define LCCR4        0x010        /* LCD Controller Control register 4 */

#define LCCR5        0x014        /* LCD Controller Control register 5 */

#define FBR0        0x020        /* DMA Channel 0 Frame Branch register */

#define FBR1        0x024        /* DMA Channel 1 Frame Branch register */

#define FBR2        0x028        /* DMA Channel 2 Frame Branch register */

#define FBR3        0x02c        /* DMA Channel 3 Frame Branch register */

#define FBR4        0x030        /* DMA Channel 4 Frame Branch register */

#define FBR5        0x110        /* DMA Channel 5 Frame Branch register */

#define FBR6        0x114        /* DMA Channel 6 Frame Branch register */

#define LCSR1        0x034        /* LCD Controller Status register 1 */

#define LCSR0        0x038        /* LCD Controller Status register 0 */

#define LIIDR        0x03c        /* LCD Controller Interrupt ID register */

#define TRGBR        0x040        /* TMED RGB Seed register */

#define TCR        0x044        /* TMED Control register */

#define OVL1C1        0x050        /* Overlay 1 Control register 1 */

#define OVL1C2        0x060        /* Overlay 1 Control register 2 */

#define OVL2C1        0x070        /* Overlay 2 Control register 1 */

#define OVL2C2        0x080        /* Overlay 2 Control register 2 */

#define CCR        0x090        /* Cursor Control register */

#define CMDCR        0x100        /* Command Control register */

#define PRSR        0x104        /* Panel Read Status register */

#define PXA_LCDDMA_CHANS        7

#define DMA_FDADR                0x00        /* Frame Descriptor Address register */

#define DMA_FSADR                0x04        /* Frame Source Address register */

#define DMA_FIDR                0x08        /* Frame ID register */

#define DMA_LDCMD                0x0c        /* Command register */

/* LCD Buffer Strength Control register */

#define BSCNTR        0x04000054

/* Bitfield masks */

#define LCCR0_ENB        (1 << 0)

#define LCCR0_CMS        (1 << 1)

#define LCCR0_SDS        (1 << 2)

#define LCCR0_LDM        (1 << 3)

#define LCCR0_SOFM0        (1 << 4)

#define LCCR0_IUM        (1 << 5)

#define LCCR0_EOFM0        (1 << 6)

#define LCCR0_PAS        (1 << 7)

#define LCCR0_DPD        (1 << 9)

#define LCCR0_DIS        (1 << 10)

#define LCCR0_QDM        (1 << 11)

#define LCCR0_PDD        (0xff << 12)

#define LCCR0_BSM0        (1 << 20)

#define LCCR0_OUM        (1 << 21)

#define LCCR0_LCDT        (1 << 22)

#define LCCR0_RDSTM        (1 << 23)

#define LCCR0_CMDIM        (1 << 24)

#define LCCR0_OUC        (1 << 25)

#define LCCR0_LDDALT        (1 << 26)

#define LCCR1_PPL(x)        ((x) & 0x3ff)

#define LCCR2_LPP(x)        ((x) & 0x3ff)

#define LCCR3_API        (15 << 16)

#define LCCR3_BPP(x)        ((((x) >> 24) & 7) | (((x) >> 26) & 8))

#define LCCR3_PDFOR(x)        (((x) >> 30) & 3)

#define LCCR4_K1(x)        (((x) >> 0) & 7)

#define LCCR4_K2(x)        (((x) >> 3) & 7)

#define LCCR4_K3(x)        (((x) >> 6) & 7)

#define LCCR4_PALFOR(x)        (((x) >> 15) & 3)

#define LCCR5_SOFM(ch)        (1 << (ch - 1))

#define LCCR5_EOFM(ch)        (1 << (ch + 7))

#define LCCR5_BSM(ch)        (1 << (ch + 15))

#define LCCR5_IUM(ch)        (1 << (ch + 23))

#define OVLC1_EN        (1 << 31)

#define CCR_CEN                (1 << 31)

#define FBR_BRA                (1 << 0)

#define FBR_BINT        (1 << 1)

#define FBR_SRCADDR        (0xfffffff << 4)

#define LCSR0_LDD        (1 << 0)

#define LCSR0_SOF0        (1 << 1)

#define LCSR0_BER        (1 << 2)

#define LCSR0_ABC        (1 << 3)

#define LCSR0_IU0        (1 << 4)

#define LCSR0_IU1        (1 << 5)

#define LCSR0_OU        (1 << 6)

#define LCSR0_QD        (1 << 7)

#define LCSR0_EOF0        (1 << 8)

#define LCSR0_BS0        (1 << 9)

#define LCSR0_SINT        (1 << 10)

#define LCSR0_RDST        (1 << 11)

#define LCSR0_CMDINT        (1 << 12)

#define LCSR0_BERCH(x)        (((x) & 7) << 28)

#define LCSR1_SOF(ch)        (1 << (ch - 1))

#define LCSR1_EOF(ch)        (1 << (ch + 7))

#define LCSR1_BS(ch)        (1 << (ch + 15))

#define LCSR1_IU(ch)        (1 << (ch + 23))

#define LDCMD_LENGTH(x)        ((x) & 0x001ffffc)

#define LDCMD_EOFINT        (1 << 21)

#define LDCMD_SOFINT        (1 << 22)

#define LDCMD_PAL        (1 << 26)

/* Route internal interrupt lines to the global IC */

static void pxa2xx_lcdc_int_update(struct pxa2xx_lcdc_s *s)

{

    int level = 0;

    level |= (s->status[0] & LCSR0_LDD)    && !(s->control[0] & LCCR0_LDM);

    level |= (s->status[0] & LCSR0_SOF0)   && !(s->control[0] & LCCR0_SOFM0);

    level |= (s->status[0] & LCSR0_IU0)    && !(s->control[0] & LCCR0_IUM);

    level |= (s->status[0] & LCSR0_IU1)    && !(s->control[5] & LCCR5_IUM(1));

    level |= (s->status[0] & LCSR0_OU)     && !(s->control[0] & LCCR0_OUM);

    level |= (s->status[0] & LCSR0_QD)     && !(s->control[0] & LCCR0_QDM);

    level |= (s->status[0] & LCSR0_EOF0)   && !(s->control[0] & LCCR0_EOFM0);

    level |= (s->status[0] & LCSR0_BS0)    && !(s->control[0] & LCCR0_BSM0);

    level |= (s->status[0] & LCSR0_RDST)   && !(s->control[0] & LCCR0_RDSTM);

    level |= (s->status[0] & LCSR0_CMDINT) && !(s->control[0] & LCCR0_CMDIM);

    level |= (s->status[1] & ~s->control[5]);

    qemu_set_irq(s->irq, !!level);

    s->irqlevel = level;

}

/* Set Branch Status interrupt high and poke associated registers */

static inline void pxa2xx_dma_bs_set(struct pxa2xx_lcdc_s *s, int ch)

{

    int unmasked;

    if (ch == 0) {

        s->status[0] |= LCSR0_BS0;

        unmasked = !(s->control[0] & LCCR0_BSM0);

    } else {

        s->status[1] |= LCSR1_BS(ch);

        unmasked = !(s->control[5] & LCCR5_BSM(ch));

    }

    if (unmasked) {

        if (s->irqlevel)

            s->status[0] |= LCSR0_SINT;

        else

            s->liidr = s->dma_ch[ch].id;

    }

}

/* Set Start Of Frame Status interrupt high and poke associated registers */

static inline void pxa2xx_dma_sof_set(struct pxa2xx_lcdc_s *s, int ch)

{

    int unmasked;

    if (!(s->dma_ch[ch].command & LDCMD_SOFINT))

        return;

    if (ch == 0) {

        s->status[0] |= LCSR0_SOF0;

        unmasked = !(s->control[0] & LCCR0_SOFM0);

    } else {

        s->status[1] |= LCSR1_SOF(ch);

        unmasked = !(s->control[5] & LCCR5_SOFM(ch));

    }

    if (unmasked) {

        if (s->irqlevel)

            s->status[0] |= LCSR0_SINT;

        else

            s->liidr = s->dma_ch[ch].id;

    }

}

/* Set End Of Frame Status interrupt high and poke associated registers */

static inline void pxa2xx_dma_eof_set(struct pxa2xx_lcdc_s *s, int ch)

{

    int unmasked;

    if (!(s->dma_ch[ch].command & LDCMD_EOFINT))

        return;

    if (ch == 0) {

        s->status[0] |= LCSR0_EOF0;

        unmasked = !(s->control[0] & LCCR0_EOFM0);

    } else {

        s->status[1] |= LCSR1_EOF(ch);

        unmasked = !(s->control[5] & LCCR5_EOFM(ch));

    }

    if (unmasked) {

        if (s->irqlevel)

            s->status[0] |= LCSR0_SINT;

        else

            s->liidr = s->dma_ch[ch].id;

    }

}

/* Set Bus Error Status interrupt high and poke associated registers */

static inline void pxa2xx_dma_ber_set(struct pxa2xx_lcdc_s *s, int ch)

{

    s->status[0] |= LCSR0_BERCH(ch) | LCSR0_BER;

    if (s->irqlevel)

        s->status[0] |= LCSR0_SINT;

    else

        s->liidr = s->dma_ch[ch].id;

}

/* Set Read Status interrupt high and poke associated registers */

static inline void pxa2xx_dma_rdst_set(struct pxa2xx_lcdc_s *s)

{

    s->status[0] |= LCSR0_RDST;

    if (s->irqlevel && !(s->control[0] & LCCR0_RDSTM))

        s->status[0] |= LCSR0_SINT;

}

/* Load new Frame Descriptors from DMA */

static void pxa2xx_descriptor_load(struct pxa2xx_lcdc_s *s)

{

    struct pxa_frame_descriptor_s *desc[PXA_LCDDMA_CHANS];

    target_phys_addr_t descptr;

    int i;

    for (i = 0; i < PXA_LCDDMA_CHANS; i ++) {

        desc[i] = 0;

        s->dma_ch[i].source = 0;

        if (!s->dma_ch[i].up)

            continue;

        if (s->dma_ch[i].branch & FBR_BRA) {

            descptr = s->dma_ch[i].branch & FBR_SRCADDR;

            if (s->dma_ch[i].branch & FBR_BINT)

                pxa2xx_dma_bs_set(s, i);

            s->dma_ch[i].branch &= ~FBR_BRA;

        } else

            descptr = s->dma_ch[i].descriptor;

        if (!(descptr >= PXA2XX_SDRAM_BASE && descptr +

                    sizeof(*desc[i]) <= PXA2XX_SDRAM_BASE + phys_ram_size))

            continue;

        descptr -= PXA2XX_SDRAM_BASE;

        desc[i] = (struct pxa_frame_descriptor_s *) (phys_ram_base + descptr);

        s->dma_ch[i].descriptor = desc[i]->fdaddr;

        s->dma_ch[i].source = desc[i]->fsaddr;

        s->dma_ch[i].id = desc[i]->fidr;

        s->dma_ch[i].command = desc[i]->ldcmd;

    }

}

static uint32_t pxa2xx_lcdc_read(void *opaque, target_phys_addr_t offset)

{

    struct pxa2xx_lcdc_s *s = (struct pxa2xx_lcdc_s *) opaque;

    int ch;

    offset -= s->base;

    switch (offset) {

    case LCCR0:

        return s->control[0];

    case LCCR1:

        return s->control[1];

    case LCCR2:

        return s->control[2];

    case LCCR3:

        return s->control[3];

    case LCCR4:

        return s->control[4];

    case LCCR5:

        return s->control[5];

    case OVL1C1:

        return s->ovl1c[0];

    case OVL1C2:

        return s->ovl1c[1];

    case OVL2C1:

        return s->ovl2c[0];

    case OVL2C2:

        return s->ovl2c[1];

    case CCR:

        return s->ccr;

    case CMDCR:

        return s->cmdcr;

    case TRGBR:

        return s->trgbr;

    case TCR:

        return s->tcr;

    case 0x200 ... 0x1000:        /* DMA per-channel registers */

        ch = (offset - 0x200) >> 4;

        if (!(ch >= 0 && ch < PXA_LCDDMA_CHANS))

            goto fail;

        switch (offset & 0xf) {

        case DMA_FDADR:

            return s->dma_ch[ch].descriptor;

        case DMA_FSADR:

            return s->dma_ch[ch].source;

        case DMA_FIDR:

            return s->dma_ch[ch].id;

        case DMA_LDCMD:

            return s->dma_ch[ch].command;

        default:

            goto fail;

        }

    case FBR0:

        return s->dma_ch[0].branch;

    case FBR1:

        return s->dma_ch[1].branch;

    case FBR2:

        return s->dma_ch[2].branch;

    case FBR3:

        return s->dma_ch[3].branch;

    case FBR4:

        return s->dma_ch[4].branch;

    case FBR5:

        return s->dma_ch[5].branch;

    case FBR6:

        return s->dma_ch[6].branch;

    case BSCNTR:

        return s->bscntr;

    case PRSR:

        return 0;

    case LCSR0:

        return s->status[0];

    case LCSR1:

        return s->status[1];

    case LIIDR:

        return s->liidr;

    default:

    fail:

        cpu_abort(cpu_single_env,

                "%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);

    }

    return 0;

}

static void pxa2xx_lcdc_write(void *opaque,

                target_phys_addr_t offset, uint32_t value)

{

    struct pxa2xx_lcdc_s *s = (struct pxa2xx_lcdc_s *) opaque;

    int ch;

    offset -= s->base;

    switch (offset) {

    case LCCR0:

        /* ACK Quick Disable done */

        if ((s->control[0] & LCCR0_ENB) && !(value & LCCR0_ENB))

            s->status[0] |= LCSR0_QD;

        if (!(s->control[0] & LCCR0_LCDT) && (value & LCCR0_LCDT))

            printf("%s: internal frame buffer unsupported\n", __FUNCTION__);

        if ((s->control[3] & LCCR3_API) &&

                (value & LCCR0_ENB) && !(value & LCCR0_LCDT))

            s->status[0] |= LCSR0_ABC;

        s->control[0] = value & 0x07ffffff;

        pxa2xx_lcdc_int_update(s);

        s->dma_ch[0].up = !!(value & LCCR0_ENB);

        s->dma_ch[1].up = (s->ovl1c[0] & OVLC1_EN) || (value & LCCR0_SDS);

        break;

    case LCCR1:

        s->control[1] = value;

        break;

    case LCCR2:

        s->control[2] = value;

        break;

    case LCCR3:

        s->control[3] = value & 0xefffffff;

        s->bpp = LCCR3_BPP(value);

        break;

    case LCCR4:

        s->control[4] = value & 0x83ff81ff;

        break;

    case LCCR5:

        s->control[5] = value & 0x3f3f3f3f;

        break;

    case OVL1C1:

        if (!(s->ovl1c[0] & OVLC1_EN) && (value & OVLC1_EN))

            printf("%s: Overlay 1 not supported\n", __FUNCTION__);

        s->ovl1c[0] = value & 0x80ffffff;

        s->dma_ch[1].up = (value & OVLC1_EN) || (s->control[0] & LCCR0_SDS);

        break;

    case OVL1C2:

        s->ovl1c[1] = value & 0x000fffff;

        break;

    case OVL2C1:

        if (!(s->ovl2c[0] & OVLC1_EN) && (value & OVLC1_EN))

            printf("%s: Overlay 2 not supported\n", __FUNCTION__);

        s->ovl2c[0] = value & 0x80ffffff;

        s->dma_ch[2].up = !!(value & OVLC1_EN);

        s->dma_ch[3].up = !!(value & OVLC1_EN);

        s->dma_ch[4].up = !!(value & OVLC1_EN);

        break;

    case OVL2C2:

        s->ovl2c[1] = value & 0x007fffff;

        break;

    case CCR:

        if (!(s->ccr & CCR_CEN) && (value & CCR_CEN))

            printf("%s: Hardware cursor unimplemented\n", __FUNCTION__);

        s->ccr = value & 0x81ffffe7;

        s->dma_ch[5].up = !!(value & CCR_CEN);

        break;

    case CMDCR:

        s->cmdcr = value & 0xff;

        break;

    case TRGBR:

        s->trgbr = value & 0x00ffffff;

        break;

    case TCR:

        s->tcr = value & 0x7fff;

        break;

    case 0x200 ... 0x1000:        /* DMA per-channel registers */

        ch = (offset - 0x200) >> 4;

        if (!(ch >= 0 && ch < PXA_LCDDMA_CHANS))

            goto fail;

        switch (offset & 0xf) {

        case DMA_FDADR:

            s->dma_ch[ch].descriptor = value & 0xfffffff0;

            break;

        default:

            goto fail;

        }

        break;

    case FBR0:

        s->dma_ch[0].branch = value & 0xfffffff3;

        break;

    case FBR1:

        s->dma_ch[1].branch = value & 0xfffffff3;

        break;

    case FBR2:

        s->dma_ch[2].branch = value & 0xfffffff3;

        break;

    case FBR3:

        s->dma_ch[3].branch = value & 0xfffffff3;

        break;

    case FBR4:

        s->dma_ch[4].branch = value & 0xfffffff3;

        break;

    case FBR5:

        s->dma_ch[5].branch = value & 0xfffffff3;

        break;

    case FBR6:

        s->dma_ch[6].branch = value & 0xfffffff3;

        break;

    case BSCNTR:

        s->bscntr = value & 0xf;

        break;

    case PRSR:

        break;

    case LCSR0:

        s->status[0] &= ~(value & 0xfff);

        if (value & LCSR0_BER)

            s->status[0] &= ~LCSR0_BERCH(7);

        break;

    case LCSR1:

        s->status[1] &= ~(value & 0x3e3f3f);

        break;

    default:

    fail:

        cpu_abort(cpu_single_env,

                "%s: Bad offset " REG_FMT "\n", __FUNCTION__, offset);

    }

}

static CPUReadMemoryFunc *pxa2xx_lcdc_readfn[] = {

    pxa2xx_lcdc_read,

    pxa2xx_lcdc_read,

    pxa2xx_lcdc_read

};

static CPUWriteMemoryFunc *pxa2xx_lcdc_writefn[] = {

    pxa2xx_lcdc_write,

    pxa2xx_lcdc_write,

    pxa2xx_lcdc_write

};

/* Load new palette for a given DMA channel, convert to internal format */

static void pxa2xx_palette_parse(struct pxa2xx_lcdc_s *s, int ch, int bpp)

{

    int i, n, format, r, g, b, alpha;

    uint32_t *dest, *src;

    s->pal_for = LCCR4_PALFOR(s->control[4]);

    format = s->pal_for;

    switch (bpp) {

    case pxa_lcdc_2bpp:

        n = 4;

        break;

    case pxa_lcdc_4bpp:

        n = 16;

        break;

    case pxa_lcdc_8bpp:

        n = 256;

        break;

    default:

        format = 0;

        return;

    }

    src = (uint32_t *) s->dma_ch[ch].pbuffer;

    dest = (uint32_t *) s->dma_ch[ch].palette;

    alpha = r = g = b = 0;

    for (i = 0; i < n; i ++) {

        switch (format) {

        case 0: /* 16 bpp, no transparency */

            alpha = 0;

            if (s->control[0] & LCCR0_CMS)

                r = g = b = *src & 0xff;

            else {

                r = (*src & 0xf800) >> 8;

                g = (*src & 0x07e0) >> 3;

                b = (*src & 0x001f) << 3;

            }

            break;

        case 1: /* 16 bpp plus transparency */

            alpha = *src & (1 << 24);

            if (s->control[0] & LCCR0_CMS)

                r = g = b = *src & 0xff;

            else {

                r = (*src & 0xf800) >> 8;

                g = (*src & 0x07e0) >> 3;

                b = (*src & 0x001f) << 3;

            }

            break;

        case 2: /* 18 bpp plus transparency */

            alpha = *src & (1 << 24);

            if (s->control[0] & LCCR0_CMS)

                r = g = b = *src & 0xff;

            else {

                r = (*src & 0xf80000) >> 16;

                g = (*src & 0x00fc00) >> 8;

                b = (*src & 0x0000f8);

            }

            break;

        case 3: /* 24 bpp plus transparency */

            alpha = *src & (1 << 24);

            if (s->control[0] & LCCR0_CMS)

                r = g = b = *src & 0xff;

            else {

                r = (*src & 0xff0000) >> 16;

                g = (*src & 0x00ff00) >> 8;

                b = (*src & 0x0000ff);

            }

            break;

        }

        switch (s->ds->depth) {

        case 8:

            *dest = rgb_to_pixel8(r, g, b) | alpha;

            break;

        case 15:

            *dest = rgb_to_pixel15(r, g, b) | alpha;

            break;

        case 16:

            *dest = rgb_to_pixel16(r, g, b) | alpha;

            break;

        case 24:

            *dest = rgb_to_pixel24(r, g, b) | alpha;

            break;

        case 32:

            *dest = rgb_to_pixel32(r, g, b) | alpha;

            break;

        }

        src ++;

        dest ++;

    }

}

static void pxa2xx_lcdc_dma0_redraw_horiz(struct pxa2xx_lcdc_s *s,

                uint8_t *fb, int *miny, int *maxy)

{

    int y, src_width, dest_width, dirty[2];

    uint8_t *src, *dest;

    ram_addr_t x, addr, new_addr, start, end;

    drawfn fn = 0;

    if (s->dest_width)

        fn = s->line_fn[s->transp][s->bpp];

    if (!fn)

        return;

    src = fb;

    src_width = (s->xres + 3) & ~3;     /* Pad to a 4 pixels multiple */

    if (s->bpp == pxa_lcdc_19pbpp || s->bpp == pxa_lcdc_18pbpp)

        src_width *= 3;

    else if (s->bpp > pxa_lcdc_16bpp)

        src_width *= 4;

    else if (s->bpp > pxa_lcdc_8bpp)

        src_width *= 2;

    dest = s->ds->data;

    dest_width = s->xres * s->dest_width;

    addr = (ram_addr_t) (fb - phys_ram_base);

    start = addr + s->yres * src_width;

    end = addr;

    dirty[0] = dirty[1] = cpu_physical_memory_get_dirty(start, VGA_DIRTY_FLAG);

    for (y = 0; y < s->yres; y ++) {

        new_addr = addr + src_width;

        for (x = addr + TARGET_PAGE_SIZE; x < new_addr;

                        x += TARGET_PAGE_SIZE) {

            dirty[1] = cpu_physical_memory_get_dirty(x, VGA_DIRTY_FLAG);

            dirty[0] |= dirty[1];

        }

        if (dirty[0] || s->invalidated) {

            fn((uint32_t *) s->dma_ch[0].palette,

                            dest, src, s->xres, s->dest_width);

            if (addr < start)

                start = addr;

            end = new_addr;

            if (y < *miny)

                *miny = y;

            if (y >= *maxy)

                *maxy = y + 1;

        }

        addr = new_addr;

        dirty[0] = dirty[1];

        src += src_width;

        dest += dest_width;

    }

    if (end > start)

        cpu_physical_memory_reset_dirty(start, end, VGA_DIRTY_FLAG);

}

static void pxa2xx_lcdc_dma0_redraw_vert(struct pxa2xx_lcdc_s *s,

                uint8_t *fb, int *miny, int *maxy)

{

    int y, src_width, dest_width, dirty[2];

    uint8_t *src, *dest;

    ram_addr_t x, addr, new_addr, start, end;

    drawfn fn = 0;

    if (s->dest_width)

        fn = s->line_fn[s->transp][s->bpp];

    if (!fn)

        return;

    src = fb;

    src_width = (s->xres + 3) & ~3;     /* Pad to a 4 pixels multiple */

    if (s->bpp == pxa_lcdc_19pbpp || s->bpp == pxa_lcdc_18pbpp)

        src_width *= 3;

    else if (s->bpp > pxa_lcdc_16bpp)

        src_width *= 4;

    else if (s->bpp > pxa_lcdc_8bpp)

        src_width *= 2;

    dest_width = s->yres * s->dest_width;

    dest = s->ds->data + dest_width * (s->xres - 1);

    addr = (ram_addr_t) (fb - phys_ram_base);

    start = addr + s->yres * src_width;

    end = addr;

    dirty[0] = dirty[1] = cpu_physical_memory_get_dirty(start, VGA_DIRTY_FLAG);

    for (y = 0; y < s->yres; y ++) {

        new_addr = addr + src_width;

        for (x = addr + TARGET_PAGE_SIZE; x < new_addr;

                        x += TARGET_PAGE_SIZE) {

            dirty[1] = cpu_physical_memory_get_dirty(x, VGA_DIRTY_FLAG);

            dirty[0] |= dirty[1];

        }

        if (dirty[0] || s->invalidated) {

            fn((uint32_t *) s->dma_ch[0].palette,

                            dest, src, s->xres, -dest_width);

            if (addr < start)

                start = addr;

            end = new_addr;

            if (y < *miny)

                *miny = y;

            if (y >= *maxy)

                *maxy = y + 1;

        }

        addr = new_addr;

        dirty[0] = dirty[1];

        src += src_width;

        dest += s->dest_width;

    }

    if (end > start)

        cpu_physical_memory_reset_dirty(start, end, VGA_DIRTY_FLAG);

}

static void pxa2xx_lcdc_resize(struct pxa2xx_lcdc_s *s)

{

    int width, height;

    if (!(s->control[0] & LCCR0_ENB))

        return;

    width = LCCR1_PPL(s->control[1]) + 1;

    height = LCCR2_LPP(s->control[2]) + 1;

    if (width != s->xres || height != s->yres) {

        if (s->orientation)

            qemu_console_resize(s->console, height, width);

        else

            qemu_console_resize(s->console, width, height);

        s->invalidated = 1;

        s->xres = width;

        s->yres = height;

    }

}

static void pxa2xx_update_display(void *opaque)

{

    struct pxa2xx_lcdc_s *s = (struct pxa2xx_lcdc_s *) opaque;

    uint8_t *fb;

    target_phys_addr_t fbptr;

    int miny, maxy;

    int ch;

    if (!(s->control[0] & LCCR0_ENB))

        return;

    pxa2xx_descriptor_load(s);

    pxa2xx_lcdc_resize(s);

    miny = s->yres;

    maxy = 0;

    s->transp = s->dma_ch[2].up || s->dma_ch[3].up;

    /* Note: With overlay planes the order depends on LCCR0 bit 25.  */

    for (ch = 0; ch < PXA_LCDDMA_CHANS; ch ++)

        if (s->dma_ch[ch].up) {

            if (!s->dma_ch[ch].source) {

                pxa2xx_dma_ber_set(s, ch);

                continue;

            }

            fbptr = s->dma_ch[ch].source;

            if (!(fbptr >= PXA2XX_SDRAM_BASE &&

                    fbptr <= PXA2XX_SDRAM_BASE + phys_ram_size)) {

                pxa2xx_dma_ber_set(s, ch);

                continue;

            }

            fbptr -= PXA2XX_SDRAM_BASE;

            fb = phys_ram_base + fbptr;

            if (s->dma_ch[ch].command & LDCMD_PAL) {

                memcpy(s->dma_ch[ch].pbuffer, fb,

                                MAX(LDCMD_LENGTH(s->dma_ch[ch].command),

                                sizeof(s->dma_ch[ch].pbuffer)));

                pxa2xx_palette_parse(s, ch, s->bpp);

            } else {

                /* Do we need to reparse palette */

                if (LCCR4_PALFOR(s->control[4]) != s->pal_for)

                    pxa2xx_palette_parse(s, ch, s->bpp);

                /* ACK frame start */

                pxa2xx_dma_sof_set(s, ch);

                s->dma_ch[ch].redraw(s, fb, &miny, &maxy);

                s->invalidated = 0;

                /* ACK frame completed */

                pxa2xx_dma_eof_set(s, ch);

            }

        }

    if (s->control[0] & LCCR0_DIS) {

        /* ACK last frame completed */

        s->control[0] &= ~LCCR0_ENB;

        s->status[0] |= LCSR0_LDD;

    }

    if (s->orientation)

        dpy_update(s->ds, miny, 0, maxy, s->xres);

    else

        dpy_update(s->ds, 0, miny, s->xres, maxy);