/* Memory addresses used by booter and friends */
+#define BASE_SEG 0x2000
+#define STACK_SEG 0x3000
+#define STACK_OFS 0xFFF0 // stack pointer
+
+#define BOOT2_SEG BASE_SEG
+#define BOOT2_OFS 0x0200 // 512 byte disk sector offset
+
+#define BIOS_ADDR 0x0C00 // BIOS disk I/O buffer
+#define BIOS_LEN 0x2400 // 9K
+
/* These are all "virtual" addresses...
* which are physical addresses plus MEMBASE.
*/
-
-#define MEMBASE 0x0
-#define BASE_SEG 0x0
-
-#define BIOS_ADDR 0x000C00 // BIOS buffer
-#define BIOS_LEN 0x002400 // 9k
-#define BOOTER_LOAD_ADDR 0x003000 // loaded here for compat.
-#define BOOTER_ADDR 0x003000 // start of booter code
-#define BOOTER_LEN 0x00B000
-#define STACK_ADDR 0x00FFF0
-#define BOOTSTRUCT_ADDR 0x011000
-#define BOOTSTRUCT_LEN 0x00F000 // it's slightly smaller
-#define EISA_CONFIG_ADDR 0x020000
-#define EISA_CONFIG_LEN 0x010000
-#define RLD_ADDR 0x030000
-#define RLD_LEN 0x070000
-#define VIDEO_ADDR 0x0A0000 // unusable space
-#define VIDEO_LEN 0x060000
-#define KERNEL_ADDR 0x100000
-#define KERNEL_LEN 0x400000
-#define RLD_MEM_ADDR 0x500000
-#define RLD_MEM_LEN 0x100000
-#define ZALLOC_ADDR 0x600000
-#define ZALLOC_LEN 0x100000
-#define MODULE_ADDR 0x700000 // to be used for compression..
-#define MODULE_LEN 0x080000
-#define KSYM_ADDR 0x780000
-#define KSYM_LEN 0x080000 // 512k
-#define TFTP_ADDR 0x800000 // 8MB
-#define TFTP_LEN 0x400000 // 4MB buffer size
-
-/* these are physical values */
-
-#define CONVENTIONAL_LEN 0x0A0000 // 640k
-#define EXTENDED_ADDR 0x100000 // 1024k
-#define KERNEL_BOOT_ADDR KERNEL_ADDR /* load at 1Mb */
-
-#define SAIO_TABLE_POINTER (BOOTER_ADDR + SAIO_TABLE_PTR_OFFSET)
-#define SAIO_TABLE_PTR_OFFSET 0x30
-
-#define ptov(paddr) ((paddr) - MEMBASE)
-#define vtop(vaddr) ((vaddr) + MEMBASE)
+#define ADDR32(seg, ofs) (((seg) << 4 ) + (ofs))
+
+#define MEMBASE 0x0
+
+#define BOOTSTRUCT_ADDR 0x011000 // it's slightly smaller
+#define BOOTSTRUCT_LEN 0x00F000
+
+#define BASE_ADDR ADDR32(BASE_SEG, 0)
+#define BOOT2_ADDR ADDR32(BOOT2_SEG, BOOT2_OFS)
+
+#define VIDEO_ADDR 0x0A0000 // unusable space
+#define VIDEO_LEN 0x060000
+
+#define KERNEL_ADDR 0x100000 // 15M kernel + drivers
+#define KERNEL_LEN 0xF00000
+
+#define ZALLOC_ADDR 0x1000000 // 4M zalloc area
+#define ZALLOC_LEN 0x400000
+
+#define LOAD_ADDR 0x01400000 // File download buffer
+#define LOAD_LEN 0x800000 // Max file size
+
+#define TFTP_ADDR LOAD_ADDR // tftp download buffer
+#define TFTP_LEN LOAD_LEN
+
+#define kLoadAddr LOAD_ADDR
+#define kLoadSize LOAD_LEN
+
+#define CONVENTIONAL_LEN 0x0A0000 // 640k
+#define EXTENDED_ADDR 0x100000 // 1024k
+
+#define ptov(paddr) ((paddr) - MEMBASE)
+#define vtop(vaddr) ((vaddr) + MEMBASE)
+
+/*
+ * Extract segment/offset from a linear address.
+ */
+#define OFFSET16(addr) ((addr) - BASE_ADDR)
+#define OFFSET(addr) ((addr) & 0xFFFF)
+#define SEGMENT(addr) (((addr) & 0xF0000) >> 4)
/*
- * Limits to the size of various things...
+ * We need a minimum of 32MB of system memory.
*/
+#define MIN_SYS_MEM_KB (32 * 1024)
-/* We need a minimum of 12Mb of system memory. */
-#define MIN_SYS_MEM_KB (12 * 1024)
+/*
+ * The number of descriptor entries in the GDT.
+ */
+#define NGDTENT 7
+
+/*
+ * The total size of the GDT in bytes.
+ * Each descriptor entry require 8 bytes.
+ */
+#define GDTLIMIT ( NGDTENT * 8 )
#endif /* !__BOOT_MEMORY_H */
projects / apple / boot.git / blobdiff