added warm lib
This commit is contained in:
notaz
parent
8ff85457e3
commit
5cc8854bc9
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@ -0,0 +1,29 @@
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@ vim:filetype=armasm
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#include <sys/syscall.h>
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.global sys_cacheflush @ void *start_addr, void *end_addr
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sys_cacheflush:
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mov r2, #0
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#ifdef __ARM_EABI__
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/* EABI version */
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str r7, [sp, #-4]!
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mov r7, #(__ARM_NR_cacheflush & 0xff)
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orr r7, r7, #(__ARM_NR_cacheflush & 0x00ff00)
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orr r7, r7, #(__ARM_NR_cacheflush & 0xff0000)
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swi 0
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ldr r7, [sp], #4
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#else
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/* OABI */
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swi __ARM_NR_cacheflush
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#endif
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bx lr
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.global spend_cycles
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spend_cycles:
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mov r0,r0,lsr #2
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0:subs r0, r0, #1
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bne 0b
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bx lr
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@ -0,0 +1,3 @@
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void sys_cacheflush(void *start_addr, void *end_addr);
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@ -0,0 +1,146 @@
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/*
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* wARM - exporting ARM processor specific privileged services to userspace
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* userspace part
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*
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* Copyright (c) Gražvydas "notaz" Ignotas, 2009
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the organization nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/utsname.h>
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#include <errno.h>
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#define WARM_CODE
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#include "warm.h"
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#include "sys_cacheflush.h"
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static int warm_fd = -1;
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int warm_init(void)
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{
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struct utsname unm;
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char buff[128];
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warm_fd = open("/proc/warm", O_RDWR);
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if (warm_fd >= 0)
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return 0;
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memset(&unm, 0, sizeof(unm));
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uname(&unm);
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snprintf(buff, sizeof(buff), "/sbin/insmod warm_%s.ko", unm.release);
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/* try to insmod */
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system(buff);
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warm_fd = open("/proc/warm", O_RDWR);
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if (warm_fd >= 0)
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return 0;
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fprintf(stderr, "wARM: can't init, acting as sys_cacheflush wrapper\n");
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return -1;
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}
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void warm_finish(void)
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{
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if (warm_fd >= 0)
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close(warm_fd);
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system("rmmod warm");
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}
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int warm_cache_op_range(int op, void *addr, unsigned long size)
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{
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struct warm_cache_op wop;
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int ret;
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if (warm_fd < 0) {
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sys_cacheflush(addr, (char *)addr + size);
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return -1;
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}
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wop.ops = op;
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wop.addr = (unsigned long)addr;
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wop.size = size;
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ret = ioctl(warm_fd, WARMC_CACHE_OP, &wop);
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if (ret != 0) {
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perror("WARMC_CACHE_OP failed");
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return -1;
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}
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return 0;
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}
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int warm_cache_op_all(int op)
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{
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return warm_cache_op_range(op, NULL, (size_t)-1);
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}
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int warm_change_cb_range(int cb, int is_set, void *addr, unsigned long size)
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{
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struct warm_change_cb ccb;
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int ret;
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if (warm_fd < 0)
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return -1;
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ccb.addr = (unsigned long)addr;
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ccb.size = size;
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ccb.cb = cb;
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ccb.is_set = is_set;
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ret = ioctl(warm_fd, WARMC_CHANGE_CB, &ccb);
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if (ret != 0) {
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perror("WARMC_CHANGE_CB failed");
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return -1;
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}
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return 0;
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}
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int warm_change_cb_upper(int cb, int is_set)
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{
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return warm_change_cb_range(cb, is_set, 0, 0);
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}
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unsigned long warm_virt2phys(const void *ptr)
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{
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unsigned long ptrio;
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int ret;
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ptrio = (unsigned long)ptr;
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ret = ioctl(warm_fd, WARMC_VIRT2PHYS, &ptrio);
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if (ret != 0) {
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perror("WARMC_VIRT2PHYS failed");
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return (unsigned long)-1;
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}
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return ptrio;
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}
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@ -0,0 +1,100 @@
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/*
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* wARM - exporting ARM processor specific privileged services to userspace
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* library functions
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*
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* Copyright (c) Gražvydas "notaz" Ignotas, 2009
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the organization nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __WARM_H__
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#define __WARM_H__ 1
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/* cache operations (warm_cache_op_*):
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* o clean - write dirty data to memory, but also leave in cache.
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* o invalidate - throw away everything in cache, losing dirty data.
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*
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* Write buffer is always drained, no ops will only drain WB
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*/
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#define WOP_D_CLEAN (1 << 0)
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#define WOP_D_INVALIDATE (1 << 1)
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#define WOP_I_INVALIDATE (1 << 2)
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/* change C and B bits (warm_change_cb_*)
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* if is_set in not zero, bits are set, else cleared.
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* the address for range function is virtual address.
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*/
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#define WCB_C_BIT (1 << 0)
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#define WCB_B_BIT (1 << 1)
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#ifndef __ASSEMBLER__
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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int warm_init(void);
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int warm_cache_op_range(int ops, void *virt_addr, unsigned long size);
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int warm_cache_op_all(int ops);
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int warm_change_cb_upper(int cb, int is_set);
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int warm_change_cb_range(int cb, int is_set, void *virt_addr, unsigned long size);
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unsigned long warm_virt2phys(const void *ptr);
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void warm_finish(void);
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#ifdef __cplusplus
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}
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#endif
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/* internal */
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#ifdef WARM_CODE
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#include <linux/ioctl.h>
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#define WARM_IOCTL_BASE 'A'
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struct warm_cache_op
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{
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unsigned long addr;
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unsigned long size;
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int ops;
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};
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struct warm_change_cb
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{
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unsigned long addr;
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unsigned long size;
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int cb;
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int is_set;
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};
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#define WARMC_CACHE_OP _IOW(WARM_IOCTL_BASE, 0, struct warm_cache_op)
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#define WARMC_CHANGE_CB _IOW(WARM_IOCTL_BASE, 1, struct warm_change_cb)
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#define WARMC_VIRT2PHYS _IOWR(WARM_IOCTL_BASE, 2, unsigned long)
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#endif /* WARM_CODE */
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#endif /* !__ASSEMBLER__ */
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#endif /* __WARM_H__ */
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