+/* SPDX-License-Identifier: GPL-2.0+ */
/*
* (C) Copyright 2008
* Niklaus Giger, niklaus.giger@member.fsf.org
- *
- * See file CREDITS for list of people who contributed to this
- * project.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
*/
#ifndef _VXWORKS_H_
#define _VXWORKS_H_
-int do_bootvx(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
+#include <efi_api.h>
+
+struct bootm_headers;
+struct cmd_tbl;
+
+/* Use Linux compatible standard DTB */
+#define VXWORKS_SYSFLG_STD_DTB 0x1
/*
- * Use bootaddr to find the location in memory that VxWorks
- * will look for the bootline string. The default value for
- * PowerPC is LOCAL_MEM_LOCAL_ADRS + BOOT_LINE_OFFSET which
- * defaults to 0x4200
+ * Physical address of memory base for VxWorks x86
+ * This is LOCAL_MEM_LOCAL_ADRS in the VxWorks kernel configuration.
*/
-#ifndef CONFIG_SYS_VXWORKS_BOOT_ADDR
-#define CONFIG_SYS_VXWORKS_BOOT_ADDR 0x4200
-#endif
+#define VXWORKS_PHYS_MEM_BASE 0x100000
-#ifndef CONFIG_SYS_VXWORKS_BOOT_DEVICE
-#if defined(CONFIG_4xx)
-#define CONFIG_SYS_VXWORKS_BOOT_DEVICE "emac(0,0)"
-#else
-#define CONFIG_SYS_VXWORKS_BOOT_DEVICE "eth(0,0)"
-#endif
-#endif
+/* x86 bootline offset relative to LOCAL_MEM_LOCAL_ADRS in VxWorks */
+#define X86_BOOT_LINE_OFFSET 0x1200
-#ifndef CONFIG_SYS_VXWORKS_SERVERNAME
-#define CONFIG_SYS_VXWORKS_SERVERNAME "srv"
-#endif
+/*
+ * VxWorks x86 E820 related stuff
+ *
+ * VxWorks on x86 gets E820 information from pre-defined offset @
+ * 0x4a00 and 0x4000. At 0x4a00 it's an information table defined
+ * by VxWorks and the actual E820 table entries starts from 0x4000.
+ * As defined by the BIOS E820 spec, the maximum number of E820 table
+ * entries is 128 and each entry occupies 20 bytes, so it's 128 * 20
+ * = 2560 (0xa00) bytes in total. That's where VxWorks stores some
+ * information that is retrieved from the BIOS E820 call and saved
+ * later for sanity test during the kernel boot-up.
+ */
+#define E820_DATA_OFFSET 0x4000
+#define E820_INFO_OFFSET 0x4a00
+
+/* E820 info signatiure "SMAP" - System MAP */
+#define E820_SIGNATURE 0x534d4150
+
+struct e820_info {
+ u32 sign; /* "SMAP" signature */
+ u32 x0; /* don't care, used by VxWorks */
+ u32 x1; /* don't care, used by VxWorks */
+ u32 x2; /* don't care, used by VxWorks */
+ u32 addr; /* last e820 table entry addr */
+ u32 x3; /* don't care, used by VxWorks */
+ u32 entries; /* e820 table entry count */
+ u32 error; /* must be zero */
+};
+
+/*
+ * VxWorks bootloader stores its size at a pre-defined offset @ 0x5004.
+ * Later when VxWorks kernel boots up and system memory information is
+ * retrieved from the E820 table, the bootloader size will be subtracted
+ * from the total system memory size to calculate the size of available
+ * memory for the OS.
+ */
+#define BOOT_IMAGE_SIZE_OFFSET 0x5004
+
+/*
+ * When booting from EFI BIOS, VxWorks bootloader stores the EFI GOP
+ * framebuffer info at a pre-defined offset @ 0x6100. When VxWorks kernel
+ * boots up, its EFI console driver tries to find such a block and if
+ * the signature matches, the framebuffer information will be used to
+ * initialize the driver.
+ *
+ * However it is not necessary to prepare an EFI environment for VxWorks's
+ * EFI console driver to function (eg: EFI loader in U-Boot). If U-Boot has
+ * already initialized the graphics card and set it to a VESA mode that is
+ * compatible with EFI GOP, we can simply prepare such a block for VxWorks.
+ */
+#define EFI_GOP_INFO_OFFSET 0x6100
+
+/* EFI GOP info signatiure */
+#define EFI_GOP_INFO_MAGIC 0xfeedface
+
+struct efi_gop_info {
+ u32 magic; /* signature */
+ struct efi_gop_mode_info info; /* EFI GOP mode info structure */
+ phys_addr_t fb_base; /* framebuffer base address */
+ u32 fb_size; /* framebuffer size */
+};
+
+int do_bootvx(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
+void boot_prep_vxworks(struct bootm_headers *images);
+void boot_jump_vxworks(struct bootm_headers *images);
#endif
projects / oweals / u-boot.git / blobdiff