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diff --git a/efi/vesa.c b/efi/vesa.c
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+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 1999-2012 H. Peter Anvin - All Rights Reserved
+ * Chandramouli Narayanan - extended for EFI support
+ *
+ * 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 <inttypes.h>
+#include <com32.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/fpu.h>
+#include <syslinux/video.h>
+#include <dprintf.h>
+#include "efi.h"
+/* We use cp865_8x16.psf as the standard font for EFI implementation
+ * the header file below contains raw data parsed from cp865_8x16.psf
+ */
+#include "cp865_8x16.h"
+#include "sys/vesa/vesa.h"
+#include "sys/vesa/video.h"
+#include "sys/vesa/fill.h"
+#include "sys/vesa/debug.h"
+
+/* EFI GOP support
+ * Note GOP support uses the VESA info structure as much as possible and
+ * extends it as needed for EFI support. Not all of the vesa info structure
+ * is populated. Care must be taken in the routines that rely the vesa
+ * informataion structure
+ */
+static void find_pixmask_bits(uint32_t mask, uint8_t *first_bit, uint8_t *len) {
+ uint8_t bit_pos = 0, bit_len = 0;
+
+ *first_bit = 0;
+ *len = 0;
+ if (mask == 0)
+ return;
+ while (!(mask & 0x1)) {
+ mask = mask >> 1;
+ bit_pos++;
+ }
+ while (mask & 0x1) {
+ mask = mask >> 1;
+ bit_len++;
+ }
+ *first_bit = bit_pos;
+ *len = bit_len;
+}
+
+unsigned long lfb_size;
+uint16_t lfb_line_size;
+uint8_t lfb_rsize;
+uint8_t lfb_gsize;
+uint8_t lfb_bsize;
+uint8_t lfb_resv_size;
+
+static int efi_vesacon_set_mode(struct vesa_info *vesa_info, int *x, int *y,
+ enum vesa_pixel_format *bestpxf)
+{
+ EFI_GUID GraphicsOutputProtocolGuid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+ EFI_GRAPHICS_OUTPUT_PROTOCOL *GraphicsOutput = NULL;
+ EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE *gop_mode;
+ EFI_GRAPHICS_OUTPUT_MODE_INFORMATION *mode_info;
+ EFI_STATUS st;
+ UINT32 mode_num = 0, bestmode;
+ BOOLEAN mode_match = FALSE;
+ UINTN sz_info;
+ struct vesa_info *vi;
+ struct vesa_mode_info *mi;
+ int err = 0;
+
+ //debug("Hello, World!\r\n");
+ /* At this point, we assume that gnu-efi library is initialized */
+ st = LibLocateProtocol(&GraphicsOutputProtocolGuid, (VOID **) &GraphicsOutput);
+ if (EFI_ERROR(st)) {
+ debug("LiblocateProtocol for GOP failed %d\n", st);
+ return 1; /* function call failed */
+ }
+
+ /* We use the VESA info structure to store relevant GOP info as much as possible */
+ gop_mode = GraphicsOutput->Mode;
+
+ mode_info = gop_mode->Info;
+ dprintf("mode %d version %d pixlfmt %d hres=%d vres=%d\n", mode_num,
+ mode_info->Version, mode_info->PixelFormat,
+ mode_info->HorizontalResolution, mode_info->VerticalResolution);
+
+ /* simply pick the best mode that suits the caller's resolution */
+ for (mode_num = 0; mode_num < gop_mode->MaxMode; mode_num++) {
+ st = uefi_call_wrapper(GraphicsOutput->QueryMode, 4, GraphicsOutput, mode_num, &sz_info, &mode_info);
+ debug("mode_num = %d query_status %d\n", mode_num, st);
+ if (st == EFI_SUCCESS && sz_info >= sizeof(EFI_GRAPHICS_OUTPUT_MODE_INFORMATION)) {
+
+ /* For now, simply pick the best mode that suits caller's resolution (x,y)
+ * FIXME: Consider any additional criteria for matching mode
+ */
+ mode_match = ((uint32_t)*x == mode_info->HorizontalResolution && (uint32_t)*y == mode_info->VerticalResolution);
+ debug("mode %d hres=%d vres=%d\n", mode_num, mode_info->HorizontalResolution, mode_info->VerticalResolution);
+ if (mode_match) {
+ bestmode = mode_num;
+ break;
+ }
+ }
+ }
+
+ if (!mode_match) {
+ /* Instead of bailing out, set the mode to the system default.
+ * Some systems do not have support for 640x480 for instance
+ * This code deals with such cases.
+ */
+ mode_info = gop_mode->Info;
+ *x = mode_info->HorizontalResolution;
+ *y = mode_info->VerticalResolution;
+ bestmode = gop_mode->Mode;
+ debug("No matching mode, setting to available default mode %d (x=%d, y=%d)\n", bestmode, *x, *y);
+ }
+
+ /* Allocate space in the bounce buffer for these structures */
+ vi = malloc(sizeof(*vi));
+ if (!vi) {
+ err = 10; /* Out of memory */
+ goto exit;
+ }
+ /* Note that the generic info is untouched as we don't find any relevance to EFI */
+ mi = &vi->mi;
+ /* Set up mode-specific information */
+ mi->h_res = *x;
+ mi->v_res = *y;
+ mi->lfb_ptr = (uint8_t *)(VOID *)(UINTN)gop_mode->FrameBufferBase;
+ lfb_size = gop_mode->FrameBufferSize;
+
+ /* FIXME:
+ * The code below treats bpp == lfb_depth ; verify
+ */
+
+ switch (mode_info->PixelFormat) {
+ case PixelRedGreenBlueReserved8BitPerColor:
+ dprintf("RGB8bit ");
+ mi->mode_attr = 0x0080; /* supports physical frame buffer */
+ mi->bpp = sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL) * 8;
+ mi->rpos = 0;
+ mi->gpos = 8;
+ mi->bpos = 16;
+ mi->resv_pos = 24;
+ lfb_resv_size = 8;
+ mi->logical_scan = lfb_line_size = (mode_info->PixelsPerScanLine * mi->bpp) / 8;
+ *bestpxf = PXF_BGRA32;
+ dprintf("bpp %d pixperScanLine %d logical_scan %d bytesperPix %d\n", mi->bpp, mode_info->PixelsPerScanLine,
+ mi->logical_scan, (mi->bpp + 7)>>3);
+ break;
+ case PixelBlueGreenRedReserved8BitPerColor:
+ dprintf("BGR8bit ");
+ mi->mode_attr = 0x0080; /* supports physical frame buffer */
+ mi->bpp = sizeof(EFI_GRAPHICS_OUTPUT_BLT_PIXEL) * 8;
+ mi->bpos = 0;
+ mi->gpos = 8;
+ mi->rpos = 16;
+ mi->resv_pos = 24;
+ lfb_resv_size = 8;
+ mi->logical_scan = lfb_line_size = (mode_info->PixelsPerScanLine * mi->bpp) / 8;
+ *bestpxf = PXF_BGRA32;
+ dprintf("bpp %d pixperScanLine %d logical_scan %d bytesperPix %d\n", mi->bpp, mode_info->PixelsPerScanLine,
+ mi->logical_scan, (mi->bpp + 7)>>3);
+ break;
+ case PixelBitMask:
+ mi->mode_attr = 0x0080; /* supports physical frame buffer */
+ dprintf("RedMask 0x%x GrnMask 0x%x BluMask 0x%x RsvMask 0x%x\n",
+ mode_info->PixelInformation.RedMask,
+ mode_info->PixelInformation.GreenMask,
+ mode_info->PixelInformation.BlueMask,
+ mode_info->PixelInformation.ReservedMask);
+ find_pixmask_bits(mode_info->PixelInformation.RedMask,
+ &mi->rpos, &lfb_rsize);
+ find_pixmask_bits(mode_info->PixelInformation.GreenMask,
+ &mi->gpos, &lfb_gsize);
+ find_pixmask_bits(mode_info->PixelInformation.BlueMask,
+ &mi->bpos, &lfb_bsize);
+ find_pixmask_bits(mode_info->PixelInformation.ReservedMask,
+ &mi->resv_pos, &lfb_resv_size);
+ mi->bpp = lfb_rsize + lfb_gsize +
+ lfb_bsize + lfb_resv_size;
+ mi->logical_scan = lfb_line_size = (mode_info->PixelsPerScanLine * mi->bpp) / 8;
+ dprintf("RPos %d Rsize %d GPos %d Gsize %d\n", mi->rpos, lfb_rsize, mi->gpos, lfb_gsize);
+ dprintf("BPos %d Bsize %d RsvP %d RsvSz %d\n", mi->bpos, lfb_bsize, mi->resv_pos, lfb_resv_size);
+ dprintf("bpp %d logical_scan %d bytesperPix %d\n", mi->bpp, mi->logical_scan, (mi->bpp + 7)>>3);
+ switch (mi->bpp) {
+ case 32:
+ *bestpxf = PXF_BGRA32;
+ break;
+ case 24:
+ *bestpxf = PXF_BGR24;
+ break;
+ case 16:
+ *bestpxf = PXF_LE_RGB16_565;
+ break;
+ default:
+ dprintf("Unable to handle bits per pixel %d, bailing out\n", mi->bpp);
+ err = 4;
+ goto exit;
+ }
+ break;
+ case PixelBltOnly:
+ /* FIXME: unsupported */
+ mi->mode_attr = 0x0000; /* no support for physical frame buffer */
+ err = 4; /* no mode found */
+ goto exit;
+ break;
+ default:
+ /* should not get here, but let's error out */
+ err = 4; /* no mode found */
+ goto exit;
+ break;
+ }
+
+ memcpy(&vesa_info->mi, mi, sizeof *mi);
+
+ /* Now set video mode */
+ st = uefi_call_wrapper(GraphicsOutput->SetMode, 2, GraphicsOutput, bestmode);
+ if (EFI_ERROR(st)) {
+ err = 9; /* Failed to set mode */
+ dprintf("Failed to set mode %d\n", bestmode);
+ goto exit;
+ }
+
+ /* TODO: Follow the code usage of vesacon_background & vesacon_shadowfb */
+ /*
+ __vesacon_background = calloc(mi->h_res*mi->v_res, 4);
+ __vesacon_shadowfb = calloc(mi->h_res*mi->v_res, 4);
+ */
+ /* FIXME: the allocation takes the possible padding into account
+ * whereas BIOS code simply allocates hres * vres bytes.
+ * Which is correct?
+ */
+ /*
+ * For performance reasons, or due to hardware restrictions, scan lines
+ * may be padded to an amount of memory alignment. These padding pixel elements
+ * are outside the area covered by HorizontalResolution and are not visible.
+ * For direct frame buffer access, this number is used as a span between starts
+ * of pixel lines in video memory. Based on the size of an individual pixel element
+ * and PixelsPerScanline, the offset in video memory from pixel element (x, y)
+ * to pixel element (x, y+1) has to be calculated as
+ * "sizeof( PixelElement ) * PixelsPerScanLine", and not
+ * "sizeof( PixelElement ) * HorizontalResolution", though in many cases
+ * those values can coincide.
+ */
+
+exit:
+ if (vi)
+ free(vi);
+
+ return err;
+}
+
+static void efi_vesacon_screencpy(size_t dst, const uint32_t *s,
+ size_t bytes, struct win_info *wi)
+{
+ size_t win_off;
+ char *win_base = wi->win_base;
+
+ /* For EFI, we simply take the offset from the framebuffer and write to it
+ * FIXME: any gotchas?
+ */
+ win_off = dst;
+ memcpy(win_base + win_off, s, bytes);
+}
+
+static int efi_vesacon_font_query(uint8_t **font)
+{
+ /* set up font info
+ * For now, font info is stored as raw data and used
+ * as such. Altenatively, the font data stored in a file
+ * could be read and parsed. (note: for this, EFI
+ * file support should be exposed via firmware structure)
+ */
+ *font = (uint8_t *)cp865_8x16_font_data;
+ return cp865_8x16_font_height;
+}
+
+__export int __vesacon_i915resolution(int x, int y)
+{
+ /* We don't support this function */
+ return 1;
+}
+
+struct vesa_ops efi_vesa_ops = {
+ .set_mode = efi_vesacon_set_mode,
+ .screencpy = efi_vesacon_screencpy,
+ .font_query = efi_vesacon_font_query,
+};
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-25 23:33:18 +0000