4 #define KERNBASE 0xf0000000 /* First address the kernel will eventually be */
6 #define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */
8 /* Here are some trap goodies */
10 /* Generic trap entry. */
11 #define TRAP_ENTRY(type, label) \
12 rd %psr, %l0; b label; rd %wim, %l3; nop;
14 /* Data/text faults */
15 #define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 1, %l7;
16 #define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 0, %l7;
18 /* This is for traps we should NEVER get. */
19 #define BAD_TRAP(num) \
20 rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3;
22 /* This is for traps when we want just skip the instruction which caused it */
23 #define SKIP_TRAP(type, name) \
24 jmpl %l2, %g0; rett %l2 + 4; nop; nop;
26 /* Notice that for the system calls we pull a trick. We load up a
27 * different pointer to the system call vector table in %l7, but call
28 * the same generic system call low-level entry point. The trap table
29 * entry sequences are also HyperSparc pipeline friendly ;-)
32 /* Software trap for Linux system calls. */
33 #define LINUX_SYSCALL_TRAP \
34 sethi %hi(sys_call_table), %l7; \
35 or %l7, %lo(sys_call_table), %l7; \
36 b linux_sparc_syscall; \
39 #define BREAKPOINT_TRAP \
46 #define KGDB_TRAP(num) \
52 #define KGDB_TRAP(num) \
56 /* The Get Condition Codes software trap for userland. */
58 b getcc_trap_handler; mov %psr, %l0; nop; nop;
60 /* The Set Condition Codes software trap for userland. */
62 b setcc_trap_handler; mov %psr, %l0; nop; nop;
64 /* The Get PSR software trap for userland. */
66 mov %psr, %i0; jmp %l2; rett %l2 + 4; nop;
68 /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and
69 * gets handled with another macro.
71 #define TRAP_ENTRY_INTERRUPT(int_level) \
72 mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3;
74 /* Window overflows/underflows are special and we need to try to be as
75 * efficient as possible here....
77 #define WINDOW_SPILL \
78 rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0;
81 rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0;
83 #endif /* __SPARC_HEAD_H */