From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- arch/sparc/include/asm/head_32.h | 84 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 arch/sparc/include/asm/head_32.h (limited to 'arch/sparc/include/asm/head_32.h') diff --git a/arch/sparc/include/asm/head_32.h b/arch/sparc/include/asm/head_32.h new file mode 100644 index 000000000..d2809c859 --- /dev/null +++ b/arch/sparc/include/asm/head_32.h @@ -0,0 +1,84 @@ +/* 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 */ -- cgit v1.2.3