diff options
Diffstat (limited to 'usr/src/uts/i86pc/sys/machprivregs.h')
| -rw-r--r-- | usr/src/uts/i86pc/sys/machprivregs.h | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/usr/src/uts/i86pc/sys/machprivregs.h b/usr/src/uts/i86pc/sys/machprivregs.h new file mode 100644 index 0000000000..1d4abe0b1c --- /dev/null +++ b/usr/src/uts/i86pc/sys/machprivregs.h @@ -0,0 +1,172 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License (the "License"). + * You may not use this file except in compliance with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ + +/* + * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#ifndef _SYS_MACHPRIVREGS_H +#define _SYS_MACHPRIVREGS_H + +#pragma ident "%Z%%M% %I% %E% SMI" + +/* + * Platform dependent instruction sequences for manipulating + * privileged state + */ + +#ifdef __cplusplus +extern "C" { +#endif + +#define ASSERT_UPCALL_MASK_IS_SET /* empty */ + +/* + * CLI and STI + */ + +#define CLI(r) \ + cli + +#define STI \ + sti + +/* + * Used to re-enable interrupts in the body of exception handlers + */ + +#if defined(__amd64) + +#define ENABLE_INTR_FLAGS \ + pushq $F_ON; \ + popfq + +#elif defined(__i386) + +#define ENABLE_INTR_FLAGS \ + pushl $F_ON; \ + popfl + +#endif /* __i386 */ + +/* + * IRET and SWAPGS + */ +#if defined(__amd64) + +#define IRET iretq +#define SWAPGS swapgs + +#elif defined(__i386) + +#define IRET iret + +#endif /* __i386 */ + +#define CLEAN_CS /* empty */ + +/* + * Macros for saving the original segment registers and restoring them + * for fast traps. + */ +#if defined(__amd64) + +/* + * Smaller versions of INTR_PUSH and INTR_POP for fast traps. + * The following registers have been pushed onto the stack by + * hardware at this point: + * + * greg_t r_rip; + * greg_t r_cs; + * greg_t r_rfl; + * greg_t r_rsp; + * greg_t r_ss; + * + * This handler is executed both by 32-bit and 64-bit applications. + * 64-bit applications allow us to treat the set (%rdi, %rsi, %rdx, + * %rcx, %r8, %r9, %r10, %r11, %rax) as volatile across function calls. + * However, 32-bit applications only expect (%eax, %edx, %ecx) to be volatile + * across a function call -- in particular, %esi and %edi MUST be saved! + * + * We could do this differently by making a FAST_INTR_PUSH32 for 32-bit + * programs, and FAST_INTR_PUSH for 64-bit programs, but it doesn't seem + * particularly worth it. + */ +#define FAST_INTR_PUSH \ + INTGATE_INIT_KERNEL_FLAGS; \ + subq $REGOFF_RIP, %rsp; \ + movq %rsi, REGOFF_RSI(%rsp); \ + movq %rdi, REGOFF_RDI(%rsp); \ + swapgs + +#define FAST_INTR_POP \ + swapgs; \ + movq REGOFF_RSI(%rsp), %rsi; \ + movq REGOFF_RDI(%rsp), %rdi; \ + addq $REGOFF_RIP, %rsp + +#define FAST_INTR_RETURN iretq + +#elif defined(__i386) + +#define FAST_INTR_PUSH \ + cld; \ + __SEGREGS_PUSH \ + __SEGREGS_LOAD_KERNEL + +#define FAST_INTR_POP \ + __SEGREGS_POP + +#define FAST_INTR_RETURN iret + +#endif /* __i386 */ + +/* + * Handling the CR0.TS bit for floating point handling. + * + * When the TS bit is *set*, attempts to touch the floating + * point hardware will result in a #nm trap. + */ +#if defined(__amd64) + +#define STTS(rtmp) \ + movq %cr0, rtmp; \ + orq $CR0_TS, rtmp; \ + movq rtmp, %cr0 + +#elif defined(__i386) + +#define STTS(rtmp) \ + movl %cr0, rtmp; \ + orl $CR0_TS, rtmp; \ + movl rtmp, %cr0 + +#endif /* __i386 */ + +#define CLTS \ + clts + +#ifdef __cplusplus +} +#endif + +#endif /* _SYS_MACHPRIVREGS_H */ |