head.h
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上传日期:2013-04-10
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- /* $Id: head.h,v 1.39 2000/05/26 22:18:45 ecd Exp $ */
- #ifndef __SPARC_HEAD_H
- #define __SPARC_HEAD_H
- #define KERNBASE 0xf0000000 /* First address the kernel will eventually be */
- #define LOAD_ADDR 0x4000 /* prom jumps to us here unless this is elf /boot */
- #define SUN4C_SEGSZ (1 << 18)
- #define SRMMU_L1_KBASE_OFFSET ((KERNBASE>>24)<<2) /* Used in boot remapping. */
- #define INTS_ENAB 0x01 /* entry.S uses this. */
- #define SUN4_PROM_VECTOR 0xFFE81000 /* SUN4 PROM needs to be hardwired */
- #define WRITE_PAUSE nop; nop; nop; /* Have to do this after %wim/%psr chg */
- #define NOP_INSN 0x01000000 /* Used to patch sparc_save_state */
- /* 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. Defaults to sun4c version at boot time. */
- #define SPARC_TFAULT rd %psr, %l0; rd %wim, %l3; b sun4c_fault; mov 1, %l7;
- #define SPARC_DFAULT rd %psr, %l0; rd %wim, %l3; b sun4c_fault; mov 0, %l7;
- #define SRMMU_TFAULT rd %psr, %l0; rd %wim, %l3; b C_LABEL(srmmu_fault); mov 1, %l7;
- #define SRMMU_DFAULT rd %psr, %l0; rd %wim, %l3; b C_LABEL(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(C_LABEL(sys_call_table)), %l7;
- or %l7, %lo(C_LABEL(sys_call_table)), %l7;
- b linux_sparc_syscall;
- rd %psr, %l0;
- /* Software trap for SunOS4.1.x system calls. */
- #define SUNOS_SYSCALL_TRAP
- rd %psr, %l0;
- sethi %hi(C_LABEL(sunos_sys_table)), %l7;
- b linux_sparc_syscall;
- or %l7, %lo(C_LABEL(sunos_sys_table)), %l7;
- #define SUNOS_NO_SYSCALL_TRAP
- b sunos_syscall;
- rd %psr, %l0;
- nop;
- nop;
- /* Software trap for Slowaris system calls. */
- #define SOLARIS_SYSCALL_TRAP
- b solaris_syscall;
- rd %psr, %l0;
- nop;
- nop;
- #define INDIRECT_SOLARIS_SYSCALL(x)
- mov x, %g1;
- b solaris_syscall;
- rd %psr, %l0;
- nop;
- #define BREAKPOINT_TRAP
- b breakpoint_trap;
- rd %psr,%l0;
- nop;
- nop;
- /* Software trap for Sparc-netbsd system calls. */
- #define NETBSD_SYSCALL_TRAP
- sethi %hi(C_LABEL(sys_call_table)), %l7;
- or %l7, %lo(C_LABEL(sys_call_table)), %l7;
- b bsd_syscall;
- rd %psr, %l0;
- /* The Get Condition Codes software trap for userland. */
- #define GETCC_TRAP
- b getcc_trap_handler; mov %psr, %l0; nop; nop;
- /* The Set Condition Codes software trap for userland. */
- #define SETCC_TRAP
- b setcc_trap_handler; mov %psr, %l0; nop; nop;
- /* The Get PSR software trap for userland. */
- #define GETPSR_TRAP
- mov %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;
- /* NMI's (Non Maskable Interrupts) are special, you can't keep them
- * from coming in, and basically if you get one, the shows over. ;(
- * On the sun4c they are usually asynchronous memory errors, on the
- * the sun4m they could be either due to mem errors or a software
- * initiated interrupt from the prom/kern on an SMP box saying "I
- * command you to do CPU tricks, read your mailbox for more info."
- */
- #define NMI_TRAP
- rd %wim, %l3; b linux_trap_nmi_sun4c; mov %psr, %l0; nop;
- /* 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 */