On 25 February 2017 at 18:23, BALATON Zoltan <bala...@eik.bme.hu> wrote:
> Do not use the base address to access data in local memory. This is in
> preparation to allow chip connected via PCI where base address depends
> on where the BAR is mapped so it will be unknown.
>
> Signed-off-by: BALATON Zoltan <bala...@eik.bme.hu>
> ---
> hw/display/sm501.c | 6 ++----
> hw/display/sm501_template.h | 8 ++++----
> 2 files changed, 6 insertions(+), 8 deletions(-)
>
> diff --git a/hw/display/sm501.c b/hw/display/sm501.c
> index 22cac97..1cda127 100644
> --- a/hw/display/sm501.c
> +++ b/hw/display/sm501.c
> @@ -460,7 +460,6 @@ typedef struct SM501State {
> QemuConsole *con;
>
> /* status & internal resources */
> - hwaddr base;
> uint32_t local_mem_size_index;
> uint8_t *local_mem;
> MemoryRegion local_mem_region;
> @@ -1400,10 +1399,9 @@ static const GraphicHwOps sm501_ops = {
> .gfx_update = sm501_update_display,
> };
>
> -static void sm501_init(SM501State *s, DeviceState *dev, uint32_t base,
> +static void sm501_init(SM501State *s, DeviceState *dev,
> uint32_t local_mem_bytes)
> {
> - s->base = base;
> s->local_mem_size_index = get_local_mem_size_index(local_mem_bytes);
> SM501_DPRINTF("sm501 local mem size=%x. index=%d\n",
> get_local_mem_size(s),
> s->local_mem_size_index);
> @@ -1461,7 +1459,7 @@ static void sm501_realize_sysbus(DeviceState *dev,
> Error **errp)
> SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
> DeviceState *usb_dev;
>
> - sm501_init(&s->state, dev, s->base, s->vram_size);
> + sm501_init(&s->state, dev, s->vram_size);
> sysbus_init_mmio(sbd, &s->state.local_mem_region);
> sysbus_init_mmio(sbd, &s->state.mmio_region);
>
> diff --git a/hw/display/sm501_template.h b/hw/display/sm501_template.h
> index 16e500b..832ee61 100644
> --- a/hw/display/sm501_template.h
> +++ b/hw/display/sm501_template.h
> @@ -103,13 +103,13 @@ static void glue(draw_hwc_line_, PIXEL_NAME)(SM501State
> *s, int crt,
> uint8_t *palette, int c_y, uint8_t *d, int width)
> {
> int x, i;
> - uint8_t bitset = 0;
> + uint8_t *pixval, bitset = 0;
>
> /* get hardware cursor pattern */
> uint32_t cursor_addr = get_hwc_address(s, crt);
> assert(0 <= c_y && c_y < SM501_HWC_HEIGHT);
> cursor_addr += SM501_HWC_WIDTH * c_y / 4; /* 4 pixels per byte */
> - cursor_addr += s->base;
> + pixval = s->local_mem + cursor_addr;
>
> /* get cursor position */
> x = get_hwc_x(s, crt);
> @@ -120,8 +120,8 @@ static void glue(draw_hwc_line_, PIXEL_NAME)(SM501State
> *s, int crt,
>
> /* get pixel value */
> if (i % 4 == 0) {
> - bitset = ldub_phys(&address_space_memory, cursor_addr);
> - cursor_addr++;
> + bitset = ldub_p(pixval);
> + pixval++;
> }
> v = bitset & 3;
> bitset >>= 2;
> --
> 2.7.4
(The data sheet suggests that the hardware cursor can also be in
"external memory", but it looks like we never supported that
previously and I can't figure out how it is supposed to work either.
So no problem with restricting it to be in the local video ram blob.)
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
thanks
-- PMM
