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Re: [Qemu-devel] [PATCH 2/4] target-openrisc: Add OpenCores FB device su
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From: |
Jia Liu |
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Subject: |
Re: [Qemu-devel] [PATCH 2/4] target-openrisc: Add OpenCores FB device support |
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Date: |
Sat, 23 Aug 2014 00:00:46 +0800 |
Hi Valentin,
On Fri, Aug 22, 2014 at 9:10 PM, Valentin Manea
<address@hidden> wrote:
> Add support for the OpenCores Framebuffer device and enable it by
> default in the OpenRISC machine.
>
> The OpenCores display device is a simple open source framebuffer device
> created http://opencores.org/project,vgafb
>
> Signed-off-by: Valentin Manea <address@hidden>
> ---
> default-configs/or32-softmmu.mak | 1 +
> hw/openrisc/Makefile.objs | 1 +
> hw/openrisc/ocfb.c | 325
> +++++++++++++++++++++++++++++++++++++++
> hw/openrisc/openrisc_sim.c | 3 +
> 4 files changed, 330 insertions(+)
> create mode 100644 hw/openrisc/ocfb.c
>
> diff --git a/default-configs/or32-softmmu.mak
> b/default-configs/or32-softmmu.mak
> index c3ff078..0e17a43 100644
> --- a/default-configs/or32-softmmu.mak
> +++ b/default-configs/or32-softmmu.mak
> @@ -5,3 +5,4 @@ CONFIG_OPENCORES_ETH=y
> CONFIG_IDE_CORE=y
> CONFIG_IDE_QDEV=y
> CONFIG_IDE_MMIO=y
> +CONFIG_FRAMEBUFFER=y
> diff --git a/hw/openrisc/Makefile.objs b/hw/openrisc/Makefile.objs
> index 61246b1..1922a22 100644
> --- a/hw/openrisc/Makefile.objs
> +++ b/hw/openrisc/Makefile.objs
> @@ -1,2 +1,3 @@
> obj-y = pic_cpu.o cputimer.o
> obj-y += openrisc_sim.o
> +obj-y += ocfb.o
> diff --git a/hw/openrisc/ocfb.c b/hw/openrisc/ocfb.c
> new file mode 100644
> index 0000000..226d1e3
> --- /dev/null
> +++ b/hw/openrisc/ocfb.c
> @@ -0,0 +1,325 @@
> +/*
> + * OpenCores framebuffer device
> + *
> + * Copyright (c) 2014 Valentin Manea
> + * Based on work by Sebastian Macke for jor1k
> http://s-macke.github.io/jor1k/
Is here a line wrapped?
I think it should looks like:
+ * Based on work by Sebastian Macke for jor1k
+ * http://s-macke.github.io/jor1k/
rather than
+ http://s-macke.github.io/jor1k/
> + * Based on Arm PrimeCell PL110 Color LCD Controller by Paul Brook
> + *
> + * Permission is hereby granted, free of charge, to any person
> obtaining a copy
> + * of this software and associated documentation files (the
> "Software"), to deal
> + * in the Software without restriction, including without limitation
> the rights
> + * to use, copy, modify, merge, publish, distribute, sublicense, and/or
> sell
> + * copies of the Software, and to permit persons to whom the Software is
> + * furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be
> included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
> OTHER
> + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> ARISING FROM,
> + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> DEALINGS IN
> + * THE SOFTWARE.
> + */
> +
> +#include "hw/sysbus.h"
> +#include "hw/display/framebuffer.h"
> +#include "ui/console.h"
> +
> +/* VGA defines */
> +#define VGA_CTRL 0x000
> +#define VGA_STAT 0x004
> +#define VGA_HTIM 0x008
> +#define VGA_VTIM 0x00c
> +#define VGA_HVLEN 0x010
> +#define VGA_VBARA 0x014
> +#define VGA_PALETTE 0x800
> +
> +#define VGA_CTRL_VEN 0x00000001 /* Video Enable */
> +#define VGA_CTRL_HIE 0x00000002 /* HSync Interrupt Enable */
> +#define VGA_CTRL_PC 0x00000800 /* 8-bit Pseudo Color Enable*/
> +#define VGA_CTRL_CD8 0x00000000 /* Color Depth 8 */
> +#define VGA_CTRL_CD16 0x00000200 /* Color Depth 16 */
> +#define VGA_CTRL_CD24 0x00000400 /* Color Depth 24 */
> +#define VGA_CTRL_CD32 0x00000600 /* Color Depth 32 */
> +#define VGA_CTRL_CD 0x00000E00 /* Color Depth Mask */
> +#define VGA_CTRL_VBL1 0x00000000 /* Burst Length 1 */
> +#define VGA_CTRL_VBL2 0x00000080 /* Burst Length 2 */
> +#define VGA_CTRL_VBL4 0x00000100 /* Burst Length 4 */
> +#define VGA_CTRL_VBL8 0x00000180 /* Burst Length 8 */
> +
> +#define PALETTE_SIZE 256
> +
> +#define TYPE_OCFB "ocfb"
> +#define OCFB(obj) OBJECT_CHECK(OCFBState, (obj), TYPE_OCFB)
> +
> +#ifdef DEBUG
> +#define DPRINTF(fmt, ...) \
> + do { printf("ocfb: " fmt , ## __VA_ARGS__); } while (0)
> +#else
> +#define DPRINTF(fmt, ...)
> +#endif
> +
> +typedef struct OCFBState {
> + SysBusDevice parent_obj;
> +
> + MemoryRegion iomem;
> + QemuConsole *con;
> + /* RAM fragment containing framebuffer */
> + MemoryRegionSection mem_section;
> + uint32_t cr;
> + uint8_t *fb;
> + uint32_t fb_size;
> + uint32_t fb_phys;
> + uint32_t cols;
> + uint32_t rows;
> + uint32_t bpp;
> + uint32_t invalidate;
> + qemu_irq irq;
> +} OCFBState;
> +
> +static int vmstate_ocfb_post_load(void *opaque, int version_id);
> +
> +static const VMStateDescription vmstate_ocfb = {
> + .name = "ocfb",
> + .version_id = 2,
> + .minimum_version_id = 1,
> + .post_load = vmstate_ocfb_post_load,
> + .fields = (VMStateField[]) {
> + VMSTATE_UINT32(cr, OCFBState),
> + VMSTATE_UINT32(fb_size, OCFBState),
> + VMSTATE_UINT32(fb_phys, OCFBState),
> + VMSTATE_UINT32(cols, OCFBState),
> + VMSTATE_UINT32(rows, OCFBState),
> + VMSTATE_UINT32(bpp, OCFBState),
> + VMSTATE_UINT32(invalidate, OCFBState),
> + VMSTATE_END_OF_LIST()
> + }
> +};
> +
> +static int ocfb_enabled(OCFBState *s)
> +{
> + return s->cr & VGA_CTRL_VEN;
> +}
> +
> +static void ocfb_update_display(void *opaque)
> +{
> + OCFBState *s = (OCFBState *)opaque;
> +
> + if (!ocfb_enabled(s)) {
> + return;
> + }
> +
> + memory_region_sync_dirty_bitmap(s->mem_section.mr);
> +
> + int dirty = memory_region_get_dirty(s->mem_section.mr,
> + s->mem_section.offset_within_region, s->fb_size,
> + DIRTY_MEMORY_VGA);
> +
> + if (dirty || s->invalidate) {
> + dpy_gfx_update(s->con, 0, 0, s->cols, s->rows);
> + }
> + s->invalidate = 0;
> + memory_region_reset_dirty(s->mem_section.mr,
> + s->mem_section.offset_within_region, s->fb_size,
> + DIRTY_MEMORY_VGA);
> +}
> +
> +static void ocfb_invalidate_display(void *opaque)
> +{
> + OCFBState *s = (OCFBState *)opaque;
> + s->invalidate = 1;
> +}
> +
> +static uint8_t *ocfb_map_fb(void *opaque, hwaddr base, hwaddr src_len)
> +{
> + OCFBState *s = (OCFBState *)opaque;
> + SysBusDevice *sbd = SYS_BUS_DEVICE(s);
> +
> + memory_region_unref(s->mem_section.mr);
> + s->mem_section = memory_region_find(sysbus_address_space(sbd),
> + base, src_len);
> + assert(s->mem_section.mr);
> + assert(s->mem_section.offset_within_address_space == base);
> +
> + if (int128_get64(s->mem_section.size) != src_len ||
> + !memory_region_is_ram(s->mem_section.mr)) {
> + return NULL;
> + }
> +
> + return cpu_physical_memory_map(base, &src_len, 0);
> +
> +}
> +
> +static uint64_t ocfb_read(void *opaque, hwaddr offset,
> + unsigned size)
> +{
> + DPRINTF("read at 0x%08X\n", (unsigned int)offset);
> + return 0;
> +}
> +
> +
> +static void ocfb_enable_console(OCFBState *s)
> +{
> + DisplaySurface *surface;
> + static const bool byteswap = true;
> + if (!s->rows || !s->cols || !s->bpp) {
> + return;
> + }
> + if (!s->fb_phys) {
> + return;
> + }
> + int stride = (s->cols * s->bpp) / 8;
> + s->fb_size = stride * s->rows;
> +
> + s->fb = ocfb_map_fb(s, s->fb_phys, s->fb_size);
> + if (!s->fb) {
> + hw_error("ocfb: bad framebuffer\n");
> + }
> + DPRINTF("fb pointer %p\n", s->fb);
> +
> + /* console.c supported depth -> buffer can be used directly */
> + surface = qemu_create_displaysurface_from(s->cols, s->rows, s->bpp,
> + stride, s->fb, byteswap);
> + dpy_gfx_replace_surface(s->con, surface);
> +}
> +
> +static inline void ocfb_read_htim(OCFBState *s, uint32_t val)
> +{
> + /* uint32_t hsync_len = ((val >> 24) & 0xF) + 1;
> + uint32_t right_margin = ((val >> 16) & 0xF) + 1;*/
> + uint32_t xres = (val & 0xFFFF) + 1;
> + s->cols = xres;
> + DPRINTF("VGA_HTIM param, xres = %u!\n", s->cols);
> +}
> +
> +static inline void ocfb_read_vtim(OCFBState *s, uint32_t val)
> +{
> + /*uint32_t vsync_len = ((val >> 24) & 0xF) + 1;
> + uint32_t lower_margin = ((val >> 16) & 0xF) + 1;*/
> + uint32_t yres = (val & 0xFFFF) + 1;
> + s->rows = yres;
> + DPRINTF("VGA_VTIM param, yres = %u!\n", s->rows);
> +}
> +
> +static void ocfb_write(void *opaque, hwaddr offset,
> + uint64_t val, unsigned size)
> +{
> + OCFBState *s = (OCFBState *)opaque;
> +
> + DPRINTF("write at 0x%08X 0x%08X\n",
> + (unsigned int)offset, (unsigned int)val);
> +
> + switch (offset) {
> + case VGA_CTRL:
> + s->cr = val;
> +
> + if ((s->cr & VGA_CTRL_CD) == VGA_CTRL_CD32) {
> + s->bpp = 32;
> + } else if ((s->cr & VGA_CTRL_CD) == VGA_CTRL_CD24) {
> + s->bpp = 32;
> + } else if ((s->cr & VGA_CTRL_CD) == VGA_CTRL_CD16) {
> + s->bpp = 16;
> + } else {
> + hw_error("Unsupported framebuffer color mode!\n");
> + }
> +
> + ocfb_invalidate_display(s);
> + if (ocfb_enabled(s)) {
> + DPRINTF("Enable FB!\n");
> + ocfb_enable_console(s);
> + }
> +
> + break;
> + case VGA_STAT:
> + DPRINTF("VGA_STAT param!\n");
> + break;
> + case VGA_HTIM:
> + ocfb_read_htim(s, val);
> + break;
> + case VGA_VTIM:
> + ocfb_read_vtim(s, val);
> + break;
> + case VGA_HVLEN:
> + DPRINTF("VGA_HVLEN param!\n");
> + break;
> + case VGA_VBARA:
> + DPRINTF("address@hidden", (unsigned int)val);
> + s->fb_phys = val;
> + break;
> + default:
> + qemu_log_mask(LOG_GUEST_ERROR,
> + "%s: Bad offset %x\n", __func__, (int)offset);
> + }
> +}
> +
> +static const MemoryRegionOps ocfb_ops = {
> + .read = ocfb_read,
> + .write = ocfb_write,
> + .endianness = DEVICE_LITTLE_ENDIAN,
> +};
> +
> +static int vmstate_ocfb_post_load(void *opaque, int version_id)
> +{
> + OCFBState *s = opaque;
> + /* Make sure we redraw, and at the right size */
> + ocfb_invalidate_display(s);
> + return 0;
> +}
> +
> +static const GraphicHwOps ocfb_gfx_ops = {
> + .invalidate = ocfb_invalidate_display,
> + .gfx_update = ocfb_update_display,
> +};
> +
> +static int ocfb_initfn(SysBusDevice *sbd)
> +{
> + DeviceState *dev = DEVICE(sbd);
> + OCFBState *s = OCFB(dev);
> +
> + memory_region_init_io(&s->iomem, OBJECT(s), &ocfb_ops, s, "ocfb",
> 0x1000);
> + sysbus_init_mmio(sbd, &s->iomem);
> + sysbus_init_irq(sbd, &s->irq);
> +
> + s->con = graphic_console_init(dev, 0, &ocfb_gfx_ops, s);
> +
> + return 0;
> +}
> +
> +static void ocfb_init(Object *obj)
> +{
> + OCFBState *s = OCFB(obj);
> +
> + s->fb = NULL;
> + s->fb_phys = 0;
> + s->cols = 0;
> + s->rows = 0;
> + s->bpp = 0;
> +}
> +
> +static void ocfb_class_init(ObjectClass *klass, void *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);
> +
> + k->init = ocfb_initfn;
> + set_bit(DEVICE_CATEGORY_DISPLAY, dc->categories);
> + dc->vmsd = &vmstate_ocfb;
> +}
> +
> +static const TypeInfo ocfb_info = {
> + .name = TYPE_OCFB,
> + .parent = TYPE_SYS_BUS_DEVICE,
> + .instance_size = sizeof(OCFBState),
> + .instance_init = ocfb_init,
> + .class_init = ocfb_class_init,
> +};
> +
> +static void ocfb_register_types(void)
> +{
> + type_register_static(&ocfb_info);
> +}
> +
> +type_init(ocfb_register_types)
> diff --git a/hw/openrisc/openrisc_sim.c b/hw/openrisc/openrisc_sim.c
> index da8647f..d636cf3 100644
> --- a/hw/openrisc/openrisc_sim.c
> +++ b/hw/openrisc/openrisc_sim.c
> @@ -161,6 +161,9 @@ static void openrisc_sim_init(MachineState *machine)
> openrisc_sim_ide_init(get_system_memory(), 0x9e000000,
> 0x9e000100, cpu->env.irq[15]);
>
> + /* OpenCores FrameBuffer device */
> + sysbus_create_simple("ocfb", 0x91000000, cpu->env.irq[8]);
> +
> cpu_openrisc_load_kernel(ram_size, kernel_filename, cpu);
> }
>
> --
> 1.9.1
>
>
Regards,
Jia