1 #ifndef __SPARC_HEAD_H 2 #define __SPARC_HEAD_H 3 4 #define KERNBASE 0xf0000000 /* First address the kernel will eventually be */ 5 6 #define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */ 7 8 /* Here are some trap goodies */ 9 10 /* Generic trap entry. */ 11 #define TRAP_ENTRY(type, label) \ 12 rd %psr, %l0; b label; rd %wim, %l3; nop; 13 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; 17 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; 21 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; 25 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 ;-) 30 */ 31 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; \ 37 rd %psr, %l0; 38 39 #define BREAKPOINT_TRAP \ 40 b breakpoint_trap; \ 41 rd %psr,%l0; \ 42 nop; \ 43 nop; 44 45 #ifdef CONFIG_KGDB 46 #define KGDB_TRAP(num) \ 47 b kgdb_trap_low; \ 48 rd %psr,%l0; \ 49 nop; \ 50 nop; 51 #else 52 #define KGDB_TRAP(num) \ 53 BAD_TRAP(num) 54 #endif 55 56 /* The Get Condition Codes software trap for userland. */ 57 #define GETCC_TRAP \ 58 b getcc_trap_handler; rd %psr, %l0; nop; nop; 59 60 /* The Set Condition Codes software trap for userland. */ 61 #define SETCC_TRAP \ 62 b setcc_trap_handler; rd %psr, %l0; nop; nop; 63 64 /* The Get PSR software trap for userland. */ 65 #define GETPSR_TRAP \ 66 rd %psr, %i0; jmp %l2; rett %l2 + 4; nop; 67 68 /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and 69 * gets handled with another macro. 70 */ 71 #define TRAP_ENTRY_INTERRUPT(int_level) \ 72 mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3; 73 74 /* Window overflows/underflows are special and we need to try to be as 75 * efficient as possible here.... 76 */ 77 #define WINDOW_SPILL \ 78 rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0; 79 80 #define WINDOW_FILL \ 81 rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0; 82 83 #endif /* __SPARC_HEAD_H */ 84