--- /dev/null
+@ vim:filetype=armasm
+#include <sys/syscall.h>
+
+
+.global sys_cacheflush @ void *start_addr, void *end_addr
+
+sys_cacheflush:
+ mov r2, #0
+#ifdef __ARM_EABI__
+ /* EABI version */
+ str r7, [sp, #-4]!
+ mov r7, #(__ARM_NR_cacheflush & 0xff)
+ orr r7, r7, #(__ARM_NR_cacheflush & 0x00ff00)
+ orr r7, r7, #(__ARM_NR_cacheflush & 0xff0000)
+ swi 0
+ ldr r7, [sp], #4
+#else
+ /* OABI */
+ swi __ARM_NR_cacheflush
+#endif
+ bx lr
+
+.global spend_cycles
+spend_cycles:
+ mov r0,r0,lsr #2
+ 0:subs r0, r0, #1
+ bne 0b
+ bx lr
+
--- /dev/null
+
+void sys_cacheflush(void *start_addr, void *end_addr);
+
--- /dev/null
+/*
+ * wARM - exporting ARM processor specific privileged services to userspace
+ * userspace part
+ *
+ * Copyright (c) Gražvydas "notaz" Ignotas, 2009
+ *
+ * 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.
+ * * Neither the name of the organization nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/utsname.h>
+#include <errno.h>
+
+#define WARM_CODE
+#include "warm.h"
+#include "sys_cacheflush.h"
+
+static int warm_fd = -1;
+
+int warm_init(void)
+{
+ struct utsname unm;
+ char buff[128];
+
+ warm_fd = open("/proc/warm", O_RDWR);
+ if (warm_fd >= 0)
+ return 0;
+
+ memset(&unm, 0, sizeof(unm));
+ uname(&unm);
+ snprintf(buff, sizeof(buff), "/sbin/insmod warm_%s.ko", unm.release);
+
+ /* try to insmod */
+ system(buff);
+ warm_fd = open("/proc/warm", O_RDWR);
+ if (warm_fd >= 0)
+ return 0;
+
+ fprintf(stderr, "wARM: can't init, acting as sys_cacheflush wrapper\n");
+ return -1;
+}
+
+void warm_finish(void)
+{
+ if (warm_fd >= 0)
+ close(warm_fd);
+ system("rmmod warm");
+}
+
+int warm_cache_op_range(int op, void *addr, unsigned long size)
+{
+ struct warm_cache_op wop;
+ int ret;
+
+ if (warm_fd < 0) {
+ sys_cacheflush(addr, (char *)addr + size);
+ return -1;
+ }
+
+ wop.ops = op;
+ wop.addr = (unsigned long)addr;
+ wop.size = size;
+
+ ret = ioctl(warm_fd, WARMC_CACHE_OP, &wop);
+ if (ret != 0) {
+ perror("WARMC_CACHE_OP failed");
+ return -1;
+ }
+
+ return 0;
+}
+
+int warm_cache_op_all(int op)
+{
+ return warm_cache_op_range(op, NULL, (size_t)-1);
+}
+
+int warm_change_cb_range(int cb, int is_set, void *addr, unsigned long size)
+{
+ struct warm_change_cb ccb;
+ int ret;
+
+ if (warm_fd < 0)
+ return -1;
+
+ ccb.addr = (unsigned long)addr;
+ ccb.size = size;
+ ccb.cb = cb;
+ ccb.is_set = is_set;
+
+ ret = ioctl(warm_fd, WARMC_CHANGE_CB, &ccb);
+ if (ret != 0) {
+ perror("WARMC_CHANGE_CB failed");
+ return -1;
+ }
+
+ return 0;
+}
+
+int warm_change_cb_upper(int cb, int is_set)
+{
+ return warm_change_cb_range(cb, is_set, 0, 0);
+}
+
+unsigned long warm_virt2phys(const void *ptr)
+{
+ unsigned long ptrio;
+ int ret;
+
+ ptrio = (unsigned long)ptr;
+ ret = ioctl(warm_fd, WARMC_VIRT2PHYS, &ptrio);
+ if (ret != 0) {
+ perror("WARMC_VIRT2PHYS failed");
+ return (unsigned long)-1;
+ }
+
+ return ptrio;
+}
+
--- /dev/null
+/*
+ * wARM - exporting ARM processor specific privileged services to userspace
+ * library functions
+ *
+ * Copyright (c) Gražvydas "notaz" Ignotas, 2009
+ *
+ * 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.
+ * * Neither the name of the organization nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 COPYRIGHT HOLDER OR CONTRIBUTORS 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.
+ */
+#ifndef __WARM_H__
+#define __WARM_H__ 1
+
+/* cache operations (warm_cache_op_*):
+ * o clean - write dirty data to memory, but also leave in cache.
+ * o invalidate - throw away everything in cache, losing dirty data.
+ *
+ * Write buffer is always drained, no ops will only drain WB
+ */
+#define WOP_D_CLEAN (1 << 0)
+#define WOP_D_INVALIDATE (1 << 1)
+#define WOP_I_INVALIDATE (1 << 2)
+
+/* change C and B bits (warm_change_cb_*)
+ * if is_set in not zero, bits are set, else cleared.
+ * the address for range function is virtual address.
+ */
+#define WCB_C_BIT (1 << 0)
+#define WCB_B_BIT (1 << 1)
+
+#ifndef __ASSEMBLER__
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+int warm_init(void);
+
+int warm_cache_op_range(int ops, void *virt_addr, unsigned long size);
+int warm_cache_op_all(int ops);
+
+int warm_change_cb_upper(int cb, int is_set);
+int warm_change_cb_range(int cb, int is_set, void *virt_addr, unsigned long size);
+
+unsigned long warm_virt2phys(const void *ptr);
+
+void warm_finish(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+/* internal */
+#ifdef WARM_CODE
+
+#include <linux/ioctl.h>
+
+#define WARM_IOCTL_BASE 'A'
+
+struct warm_cache_op
+{
+ unsigned long addr;
+ unsigned long size;
+ int ops;
+};
+
+struct warm_change_cb
+{
+ unsigned long addr;
+ unsigned long size;
+ int cb;
+ int is_set;
+};
+
+#define WARMC_CACHE_OP _IOW(WARM_IOCTL_BASE, 0, struct warm_cache_op)
+#define WARMC_CHANGE_CB _IOW(WARM_IOCTL_BASE, 1, struct warm_change_cb)
+#define WARMC_VIRT2PHYS _IOWR(WARM_IOCTL_BASE, 2, unsigned long)
+
+#endif /* WARM_CODE */
+#endif /* !__ASSEMBLER__ */
+#endif /* __WARM_H__ */
notaz.gp2x.de / gpsp.git / commitdiff