1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun #ifndef __SPARC_HEAD_H 3*4882a593Smuzhiyun #define __SPARC_HEAD_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #define KERNBASE 0xf0000000 /* First address the kernel will eventually be */ 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun #define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */ 8*4882a593Smuzhiyun 9*4882a593Smuzhiyun /* Here are some trap goodies */ 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun /* Generic trap entry. */ 12*4882a593Smuzhiyun #define TRAP_ENTRY(type, label) \ 13*4882a593Smuzhiyun rd %psr, %l0; b label; rd %wim, %l3; nop; 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* Data/text faults */ 16*4882a593Smuzhiyun #define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 1, %l7; 17*4882a593Smuzhiyun #define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 0, %l7; 18*4882a593Smuzhiyun 19*4882a593Smuzhiyun /* This is for traps we should NEVER get. */ 20*4882a593Smuzhiyun #define BAD_TRAP(num) \ 21*4882a593Smuzhiyun rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3; 22*4882a593Smuzhiyun 23*4882a593Smuzhiyun /* This is for traps when we want just skip the instruction which caused it */ 24*4882a593Smuzhiyun #define SKIP_TRAP(type, name) \ 25*4882a593Smuzhiyun jmpl %l2, %g0; rett %l2 + 4; nop; nop; 26*4882a593Smuzhiyun 27*4882a593Smuzhiyun /* Notice that for the system calls we pull a trick. We load up a 28*4882a593Smuzhiyun * different pointer to the system call vector table in %l7, but call 29*4882a593Smuzhiyun * the same generic system call low-level entry point. The trap table 30*4882a593Smuzhiyun * entry sequences are also HyperSparc pipeline friendly ;-) 31*4882a593Smuzhiyun */ 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun /* Software trap for Linux system calls. */ 34*4882a593Smuzhiyun #define LINUX_SYSCALL_TRAP \ 35*4882a593Smuzhiyun sethi %hi(sys_call_table), %l7; \ 36*4882a593Smuzhiyun or %l7, %lo(sys_call_table), %l7; \ 37*4882a593Smuzhiyun b linux_sparc_syscall; \ 38*4882a593Smuzhiyun rd %psr, %l0; 39*4882a593Smuzhiyun 40*4882a593Smuzhiyun #define BREAKPOINT_TRAP \ 41*4882a593Smuzhiyun b breakpoint_trap; \ 42*4882a593Smuzhiyun rd %psr,%l0; \ 43*4882a593Smuzhiyun nop; \ 44*4882a593Smuzhiyun nop; 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun #ifdef CONFIG_KGDB 47*4882a593Smuzhiyun #define KGDB_TRAP(num) \ 48*4882a593Smuzhiyun mov num, %l7; \ 49*4882a593Smuzhiyun b kgdb_trap_low; \ 50*4882a593Smuzhiyun rd %psr,%l0; \ 51*4882a593Smuzhiyun nop; 52*4882a593Smuzhiyun #else 53*4882a593Smuzhiyun #define KGDB_TRAP(num) \ 54*4882a593Smuzhiyun BAD_TRAP(num) 55*4882a593Smuzhiyun #endif 56*4882a593Smuzhiyun 57*4882a593Smuzhiyun /* The Get Condition Codes software trap for userland. */ 58*4882a593Smuzhiyun #define GETCC_TRAP \ 59*4882a593Smuzhiyun b getcc_trap_handler; rd %psr, %l0; nop; nop; 60*4882a593Smuzhiyun 61*4882a593Smuzhiyun /* The Set Condition Codes software trap for userland. */ 62*4882a593Smuzhiyun #define SETCC_TRAP \ 63*4882a593Smuzhiyun b setcc_trap_handler; rd %psr, %l0; nop; nop; 64*4882a593Smuzhiyun 65*4882a593Smuzhiyun /* The Get PSR software trap for userland. */ 66*4882a593Smuzhiyun #define GETPSR_TRAP \ 67*4882a593Smuzhiyun rd %psr, %i0; jmp %l2; rett %l2 + 4; nop; 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun /* This is for hard interrupts from level 1-14, 15 is non-maskable (nmi) and 70*4882a593Smuzhiyun * gets handled with another macro. 71*4882a593Smuzhiyun */ 72*4882a593Smuzhiyun #define TRAP_ENTRY_INTERRUPT(int_level) \ 73*4882a593Smuzhiyun mov int_level, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3; 74*4882a593Smuzhiyun 75*4882a593Smuzhiyun /* Window overflows/underflows are special and we need to try to be as 76*4882a593Smuzhiyun * efficient as possible here.... 77*4882a593Smuzhiyun */ 78*4882a593Smuzhiyun #define WINDOW_SPILL \ 79*4882a593Smuzhiyun rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0; 80*4882a593Smuzhiyun 81*4882a593Smuzhiyun #define WINDOW_FILL \ 82*4882a593Smuzhiyun rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0; 83*4882a593Smuzhiyun 84*4882a593Smuzhiyun #endif /* __SPARC_HEAD_H */ 85