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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
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