1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __SPARC_HEAD_H 3 #define __SPARC_HEAD_H 4 5 #define KERNBASE 0xf0000000 /* First address the kernel will eventually be */ 6 7 #define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */ 8 9 /* Here are some trap goodies */ 10 11 /* Generic trap entry. */ 12 #define TRAP_ENTRY(type, label) \ 13 rd %psr, %l0; b label; rd %wim, %l3; nop; 14 15 /* Data/text faults */ 16 #define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 1, %l7; 17 #define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 0, %l7; 18 19 /* This is for traps we should NEVER get. */ 20 #define BAD_TRAP(num) \ 21 rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3; 22 23 /* This is for traps when we want just skip the instruction which caused it */ 24 #define SKIP_TRAP(type, name) \ 25 jmpl %l2, %g0; rett %l2 + 4; nop; nop; 26 27 /* Notice that for the system calls we pull a trick. We load up a 28 * different pointer to the system call vector table in %l7, but call 29 * the same generic system call low-level entry point. The trap table 30 * entry sequences are also HyperSparc pipeline friendly ;-) 31 */ 32 33 /* Software trap for Linux system calls. */ 34 #define LINUX_SYSCALL_TRAP \ 35 sethi %hi(sys_call_table), %l7; \ 36 or %l7, %lo(sys_call_table), %l7; \ 37 b linux_sparc_syscall; \ 38 rd %psr, %l0; 39 40 #define BREAKPOINT_TRAP \ 41 b breakpoint_trap; \ 42 rd %psr,%l0; \ 43 nop; \ 44 nop; 45 46 #ifdef CONFIG_KGDB 47 #define KGDB_TRAP(num) \ 48 mov num, %l7; \ 49 b kgdb_trap_low; \ 50 rd %psr,%l0; \ 51 nop; 52 #else 53 #define KGDB_TRAP(num) \ 54 BAD_TRAP(num) 55 #endif 56 57 /* The Get Condition Codes software trap for userland. */ 58 #define GETCC_TRAP \ 59 b getcc_trap_handler; rd %psr, %l0; nop; nop; 60 61 /* The Set Condition Codes software trap for userland. */ 62 #define SETCC_TRAP \ 63 b setcc_trap_handler; rd %psr, %l0; nop; nop; 64 65 /* The Get PSR software trap for userland. */ 66 #define GETPSR_TRAP \ 67 rd %psr, %i0; jmp %l2; rett %l2 + 4; nop; 68 69 /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and 70 * gets handled with another macro. 71 */ 72 #define TRAP_ENTRY_INTERRUPT(int_level) \ 73 mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3; 74 75 /* Window overflows/underflows are special and we need to try to be as 76 * efficient as possible here.... 77 */ 78 #define WINDOW_SPILL \ 79 rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0; 80 81 #define WINDOW_FILL \ 82 rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0; 83 84 #endif /* __SPARC_HEAD_H */ 85