| 0,0 → 1,162 |
|---|
| /* |
| * Copyright (C) 2005 Martin Decky |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup ppc64 |
| * @{ |
| */ |
| /** @file |
| */ |
| |
| #ifndef __ppc64_ASM_H__ |
| #define __ppc64_ASM_H__ |
| |
| #include <arch/types.h> |
| #include <config.h> |
| |
| /** Enable interrupts. |
| * |
| * Enable interrupts and return previous |
| * value of EE. |
| * |
| * @return Old interrupt priority level. |
| */ |
| static inline ipl_t interrupts_enable(void) |
| { |
| ipl_t v; |
| ipl_t tmp; |
| |
| asm volatile ( |
| "mfmsr %0\n" |
| "mfmsr %1\n" |
| "ori %1, %1, 1 << 15\n" |
| "mtmsr %1\n" |
| : "=r" (v), "=r" (tmp) |
| ); |
| return v; |
| } |
| |
| /** Disable interrupts. |
| * |
| * Disable interrupts and return previous |
| * value of EE. |
| * |
| * @return Old interrupt priority level. |
| */ |
| static inline ipl_t interrupts_disable(void) |
| { |
| ipl_t v; |
| ipl_t tmp; |
| |
| asm volatile ( |
| "mfmsr %0\n" |
| "mfmsr %1\n" |
| "rlwinm %1, %1, 0, 17, 15\n" |
| "mtmsr %1\n" |
| : "=r" (v), "=r" (tmp) |
| ); |
| return v; |
| } |
| |
| /** Restore interrupt priority level. |
| * |
| * Restore EE. |
| * |
| * @param ipl Saved interrupt priority level. |
| */ |
| static inline void interrupts_restore(ipl_t ipl) |
| { |
| ipl_t tmp; |
| |
| asm volatile ( |
| "mfmsr %1\n" |
| "rlwimi %0, %1, 0, 17, 15\n" |
| "cmpw 0, %0, %1\n" |
| "beq 0f\n" |
| "mtmsr %0\n" |
| "0:\n" |
| : "=r" (ipl), "=r" (tmp) |
| : "0" (ipl) |
| : "cr0" |
| ); |
| } |
| |
| /** Return interrupt priority level. |
| * |
| * Return EE. |
| * |
| * @return Current interrupt priority level. |
| */ |
| static inline ipl_t interrupts_read(void) |
| { |
| ipl_t v; |
| |
| asm volatile ( |
| "mfmsr %0\n" |
| : "=r" (v) |
| ); |
| return v; |
| } |
| |
| /** Return base address of current stack. |
| * |
| * Return the base address of the current stack. |
| * The stack is assumed to be STACK_SIZE bytes long. |
| * The stack must start on page boundary. |
| */ |
| static inline uintptr_t get_stack_base(void) |
| { |
| uintptr_t v; |
| |
| asm volatile ( |
| "and %0, %%sp, %1\n" |
| : "=r" (v) |
| : "r" (~(STACK_SIZE - 1)) |
| ); |
| return v; |
| } |
| |
| static inline void cpu_sleep(void) |
| { |
| } |
| |
| static inline void cpu_halt(void) |
| { |
| asm volatile ( |
| "b 0\n" |
| ); |
| } |
| |
| void asm_delay_loop(uint32_t t); |
| |
| extern void userspace_asm(uintptr_t uspace_uarg, uintptr_t stack, uintptr_t entry); |
| |
| #endif |
| |
| /** @} |
| */ |
| |