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- #ifndef __SPARC_HEAD_H
- #define __SPARC_HEAD_H
-
- #define KERNSIZE 134217728 /* this is how much of a mapping the prom promises */
- #define PAGESIZE 4096 /* luckily this is the same on sun4c's and sun4m's */
- #define PAGESHIFT 12
- #define PROM_BASE -1568768 /* casa 'de PROM */
- #define LOAD_ADDR 0x4000 /* prom jumps to us here */
- #define C_STACK 96
- #define SUN4C_SEGSZ (1 << 18)
- #define USRSTACK 0x0 /* no joke, this is temporary, trust me */
- #define INT_ENABLE_REG_PHYSADR 0xf5000000
- #define INTS_ENAB 0x01
-
- #define BOOT_MSG_LEN 61
- #define BOOT_MSG2_LEN 50
-
-
- #define WRITE_PAUSE nop; nop; nop;
-
- #define PAGE_SIZE 4096
-
- /* Here are some trap goodies */
-
-
- /* Generic trap entry. */
-
- #define TRAP_ENTRY(type, label) \
- mov (type), %l3; b label; rd %psr, %l0; nop;
-
- /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and
- * gets handled with another macro.
- */
-
- #define TRAP_ENTRY_INTERRUPT(int_level) \
- mov int_level, %l3; b stray_irq_entry; rd %psr, %l0; nop;
-
- /* Here is the macro for soft interrupts (ie. not as urgent as hard ones)
- * which need to jump to a different handler.
- */
-
- #define TRAP_ENTRY_INTERRUPT_SOFT(int_level, ident) \
- mov int_level, %l3; rd %psr, %l0; b stray_irq_entry; mov ident, %l4;
-
- /* The above two macros are for generic traps. The following is made
- * especially for timer interrupts at IRQ level 14.
- */
-
- #define TRAP_ENTRY_TIMER \
- mov 10, %l3; rd %psr, %l0; b sparc_timer; nop;
-
- /* Non-maskable interrupt entry macro. You have to turn off all interrupts
- * to not receive this. This is usually due to a asynchronous memory error.
- * All we can really do is stop the show. :-(
- */
-
- #define TRAP_ENTRY_INTERRUPT_NMI(t_type, jmp_to) \
- mov t_type, %l3; b jmp_to; rd %psr, %l0; nop;
-
- /* Trap entry code in entry.S needs the offsets into task_struct
- * to get at the thread_struct goodies during window craziness.
- *
- * NOTE: We need to keep these values under 0x3ff in order to do
- * efficient load/stores in the window fill/spill handlers.
- * See TRAP_WIN_CLEAN in entry.S for details.
- */
-
- #define THREAD_UWINDOWS 0x3bc
- #define THREAD_WIM 0x3c0
- #define THREAD_W_SAVED 0x3c4
- #define THREAD_KSP 0x3c8
- #define THREAD_USP 0x3cc
- #define THREAD_REG_WINDOW 0x3d4
-
- #endif __SPARC_HEAD_H
-