BootX infos, borrowed from linux sources include/asm-ppc/bootx.h

2024-11-14 06:08:49 +00:00 · 2005-05-11 12:24:59 +00:00 · 2005-05-11 12:24:59 +00:00 · a440a330bd
commit a440a330bd
parent 2d5e941737
1 changed files with 123 additions and 0 deletions
--- a/second/bootx.h
+++ b/second/bootx.h
@ -0,0 +1,123 @@
+/*
+ * This file describes the structure passed from the BootX application
+ * (for MacOS) when it is used to boot Linux.
+ *
+ * Written by Benjamin Herrenschmidt.
+ * Modified by Laurent Vivier
+ */
+
+
+#ifndef __BOOTX_H__
+#define __BOOTX_H__
+
+/* On kernel entry:
+ *
+ * r3 = 0x426f6f58    ('BooX')
+ * r4 = pointer to boot_infos
+ * r5 = NULL
+ *
+ * Data and instruction translation disabled, interrupts
+ * disabled, kernel loaded at physical 0x00000000 on PCI
+ * machines (will be different on NuBus).
+ */
+
+#define BOOT_INFO_VERSION               5
+#define BOOT_INFO_COMPATIBLE_VERSION    1
+
+/* Bit in the architecture flag mask. More to be defined in
+   future versions. Note that either BOOT_ARCH_PCI or
+   BOOT_ARCH_NUBUS is set. The other BOOT_ARCH_NUBUS_xxx are
+   set additionally when BOOT_ARCH_NUBUS is set.
+ */
+#define BOOT_ARCH_PCI                   0x00000001UL
+#define BOOT_ARCH_NUBUS                 0x00000002UL
+#define BOOT_ARCH_NUBUS_CLASS		0x00000070UL
+#define BOOT_ARCH_NUBUS_PDM             0x00000010UL
+#define BOOT_ARCH_NUBUS_PERFORMA        0x00000020UL
+#define BOOT_ARCH_NUBUS_POWERBOOK       0x00000040UL
+
+/*  Maximum number of ranges in phys memory map */
+#define MAX_MEM_MAP_SIZE				26
+
+/* This is the format of an element in the physical memory map. Note that
+   the map is optional and current BootX will only build it for pre-PCI
+   machines */
+typedef struct boot_info_map_entry
+{
+    u_int32_t       physAddr;                /* Physical starting address */
+    u_int32_t       size;                    /* Size in bytes */
+} boot_info_map_entry_t;
+
+
+/* Here are the boot informations that are passed to the bootstrap
+ * Note that the kernel arguments and the device tree are appended
+ * at the end of this structure. */
+typedef struct boot_infos
+{
+    /* Version of this structure */
+    u_int32_t       version;
+    /* backward compatible down to version: */
+    u_int32_t       compatible_version;
+
+    /* NEW (vers. 2) this holds the current _logical_ base addr of
+       the frame buffer (for use by early boot message) */
+    u_int8_t*       logicalDisplayBase;
+
+    /* NEW (vers. 4) Apple's machine identification */
+    u_int32_t       machineID;
+
+    /* NEW (vers. 4) Detected hw architecture */
+    u_int32_t       architecture;
+
+    /* The device tree (internal addresses relative to the beginning of the tree,
+     * device tree offset relative to the beginning of this structure).
+     * On pre-PCI macintosh (BOOT_ARCH_PCI bit set to 0 in architecture), this
+     * field is 0.
+     */
+    u_int32_t       deviceTreeOffset;        /* Device tree offset */
+    u_int32_t       deviceTreeSize;          /* Size of the device tree */
+
+    /* Some infos about the current MacOS display */
+    u_int32_t       dispDeviceRect[4];       /* left,top,right,bottom */
+    u_int32_t       dispDeviceDepth;         /* (8, 16 or 32) */
+    u_int8_t*       dispDeviceBase;          /* base address (physical) */
+    u_int32_t       dispDeviceRowBytes;      /* rowbytes (in bytes) */
+    u_int32_t       dispDeviceColorsOffset;  /* Colormap (8 bits only) or 0 (*) */
+    /* Optional offset in the registry to the current
+     * MacOS display. (Can be 0 when not detected) */
+     u_int32_t      dispDeviceRegEntryOffset;
+
+    /* Optional pointer to boot ramdisk (offset from this structure) */
+    u_int32_t       ramDisk;
+    u_int32_t       ramDiskSize;             /* size of ramdisk image */
+
+    /* Kernel command line arguments (offset from this structure) */
+    u_int32_t       kernelParamsOffset;
+
+    /* ALL BELOW NEW (vers. 4) */
+
+    /* This defines the physical memory. Valid with BOOT_ARCH_NUBUS flag
+       (non-PCI) only. On PCI, memory is contiguous and it's size is in the
+       device-tree. */
+    boot_info_map_entry_t
+    	        physMemoryMap[MAX_MEM_MAP_SIZE]; /* Where the phys memory is */
+    u_int32_t       physMemoryMapSize;               /* How many entries in map */
+
+
+    /* The framebuffer size (optional, currently 0) */
+    u_int32_t       frameBufferSize;         /* Represents a max size, can be 0. */
+
+    /* NEW (vers. 5) */
+
+    /* Total params size (args + colormap + device tree + ramdisk) */
+    u_int32_t       totalParamsSize;
+
+} boot_infos_t __attribute__ ((packed));
+
+/* (*) The format of the colormap is 256 * 3 * 2 bytes. Each color index is represented
+ * by 3 short words containing a 16 bits (unsigned) color component.
+ * Later versions may contain the gamma table for direct-color devices here.
+ */
+#define BOOTX_COLORTABLE_SIZE    (256UL*3UL*2UL)
+
+#endif