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:
/
usr
/
src
/
linux-headers-6.8.0-83-generic
/
arch
/
sparc
/
include
/
asm
/ [
drwxr-xr-x
]
upload
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head_32.h
/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __SPARC_HEAD_H #define __SPARC_HEAD_H #define KERNBASE 0xf0000000 /* First address the kernel will eventually be */ #define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */ /* Here are some trap goodies */ /* Generic trap entry. */ #define TRAP_ENTRY(type, label) \ rd %psr, %l0; b label; rd %wim, %l3; nop; /* Data/text faults */ #define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 1, %l7; #define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b srmmu_fault; mov 0, %l7; /* This is for traps we should NEVER get. */ #define BAD_TRAP(num) \ rd %psr, %l0; mov num, %l7; b bad_trap_handler; rd %wim, %l3; /* This is for traps when we want just skip the instruction which caused it */ #define SKIP_TRAP(type, name) \ jmpl %l2, %g0; rett %l2 + 4; nop; nop; /* Notice that for the system calls we pull a trick. We load up a * different pointer to the system call vector table in %l7, but call * the same generic system call low-level entry point. The trap table * entry sequences are also HyperSparc pipeline friendly ;-) */ /* Software trap for Linux system calls. */ #define LINUX_SYSCALL_TRAP \ sethi %hi(sys_call_table), %l7; \ or %l7, %lo(sys_call_table), %l7; \ b linux_sparc_syscall; \ rd %psr, %l0; #define BREAKPOINT_TRAP \ b breakpoint_trap; \ rd %psr,%l0; \ nop; \ nop; #ifdef CONFIG_KGDB #define KGDB_TRAP(num) \ mov num, %l7; \ b kgdb_trap_low; \ rd %psr,%l0; \ nop; #else #define KGDB_TRAP(num) \ BAD_TRAP(num) #endif /* The Get Condition Codes software trap for userland. */ #define GETCC_TRAP \ b getcc_trap_handler; rd %psr, %l0; nop; nop; /* The Set Condition Codes software trap for userland. */ #define SETCC_TRAP \ b setcc_trap_handler; rd %psr, %l0; nop; nop; /* The Get PSR software trap for userland. */ #define GETPSR_TRAP \ rd %psr, %i0; jmp %l2; rett %l2 + 4; 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, %l7; rd %psr, %l0; b real_irq_entry; rd %wim, %l3; /* Window overflows/underflows are special and we need to try to be as * efficient as possible here.... */ #define WINDOW_SPILL \ rd %psr, %l0; rd %wim, %l3; b spill_window_entry; andcc %l0, PSR_PS, %g0; #define WINDOW_FILL \ rd %psr, %l0; rd %wim, %l3; b fill_window_entry; andcc %l0, PSR_PS, %g0; #endif /* __SPARC_HEAD_H */
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