mirror of
https://github.com/projectacrn/acrn-hypervisor.git
synced 2025-06-25 15:02:13 +00:00
1ed96bfbf8
Legacy VGA & VBE interface as a common interface is supported by many legacy and modern OS. Many installer of OS distribution use this interface to display the GUI of installer when setup a refresh new installation on bare-metal. Besides, Windows OS always use this interface to display it's BSOD, recovery mode & safe mode GUI. It is need because Windows don't include virtio-gpu driver as their in-box driver, VGA interface will be used before the virtio-gpu driver been installed. To be compatiable with the PCI bar layout of legacy VGA, the layout is refined to meet with the requirement of legacy VGA and modern virtio-gpu. BAR0: VGA Framebuffer memory, 16 MB in size. BAR2: MMIO Space [0x0000~0x03ff] EDID data blob [0x0400~0x041f] VGA ioports registers [0x0500~0x0516] bochs display interface registers [0x1000~0x17ff] Virtio common configuration registers [0x1800~0x1fff] Virtio ISR state registers [0x2000~0x2fff] Virtio device configuration registers [0x3000~0x3fff] Virtio notification registers BAR4: MSI/MSI-X BAR5: Virtio port io Tracked-On: #7210 Signed-off-by: Sun Peng <peng.p.sun@linux.intel.com> Reviewed-by: Zhao, yakui <yakui.zhao@intel.com> Acked-by: Wang, Yu1 <yu1.wang@intel.com>
92 lines
1.6 KiB
C
92 lines
1.6 KiB
C
/*
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* Copyright (C) 2022 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include "gc.h"
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struct gfx_ctx *
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gc_init(int width, int height, void *fbaddr)
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{
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struct gfx_ctx *gc;
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struct gfx_ctx_image *gc_image;
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gc = calloc(1, sizeof(struct gfx_ctx));
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assert(gc != NULL);
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gc_image = calloc(1, sizeof(struct gfx_ctx_image));
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assert(gc_image != NULL);
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gc_image->width = width;
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gc_image->height = height;
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if (fbaddr) {
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gc_image->data = fbaddr;
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gc->raw = 1;
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} else {
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gc_image->data = calloc(width * height, sizeof(uint32_t));
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gc->raw = 0;
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}
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gc->gc_image = gc_image;
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return gc;
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}
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void
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gc_deinit(struct gfx_ctx *gc)
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{
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if (!gc)
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return;
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if (gc->gc_image) {
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if (!gc->raw && gc->gc_image->data) {
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free(gc->gc_image->data);
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gc->gc_image->data = NULL;
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}
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free(gc->gc_image);
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gc->gc_image = NULL;
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}
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free(gc);
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gc = NULL;
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}
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void
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gc_set_fbaddr(struct gfx_ctx *gc, void *fbaddr)
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{
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gc->raw = 1;
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if (gc->gc_image->data && gc->gc_image->data != fbaddr)
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free(gc->gc_image->data);
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gc->gc_image->data = fbaddr;
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}
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struct gfx_ctx_image *
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gc_get_image(struct gfx_ctx *gc)
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{
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if (gc == NULL)
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return NULL;
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return gc->gc_image;
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}
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void
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gc_resize(struct gfx_ctx *gc, int width, int height)
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{
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struct gfx_ctx_image *gc_image;
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gc_image = gc->gc_image;
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gc_image->width = width;
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gc_image->height = height;
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if (!gc->raw) {
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gc_image->data = realloc(gc_image->data,
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width * height * sizeof(uint32_t));
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if (gc_image->data != NULL)
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memset(gc_image->data, 0, width * height *
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sizeof(uint32_t));
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}
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}
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