2 * This file is part of the flashrom project.
4 * Copyright (C) 2009,2010 Carl-Daniel Hailfinger
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24 #include <sys/types.h>
25 #if !defined (__DJGPP__) && !defined(__LIBPAYLOAD__)
29 #if !defined (__DJGPP__)
35 #if defined(__i386__) || defined(__x86_64__)
37 /* sync primitive is not needed because x86 uses uncached accesses
38 * which have a strongly ordered memory model.
40 static inline void sync_primitive(void)
44 #if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__DragonFly__)
48 int release_io_perms(void *p)
50 #if defined(__DJGPP__) || defined(__LIBPAYLOAD__)
52 #if defined (__sun) && (defined(__i386) || defined(__amd64))
53 sysi86(SI86V86, V86SC_IOPL, 0);
54 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined (__DragonFly__)
63 /* Get I/O permissions with automatic permission release on shutdown. */
64 int rget_io_perms(void)
66 #if defined(__DJGPP__) || defined(__LIBPAYLOAD__)
67 /* We have full permissions by default. */
70 #if defined (__sun) && (defined(__i386) || defined(__amd64))
71 if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) != 0) {
72 #elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined (__DragonFly__)
73 if ((io_fd = open("/dev/io", O_RDWR)) < 0) {
77 msg_perr("ERROR: Could not get I/O privileges (%s).\n"
78 "You need to be root.\n", strerror(errno));
79 #if defined (__OpenBSD__)
80 msg_perr("Please set securelevel=-1 in /etc/rc.securelevel "
81 "and reboot, or reboot into \n");
82 msg_perr("single user mode.\n");
86 register_shutdown(release_io_perms, NULL);
92 #elif defined(__powerpc__) || defined(__powerpc64__) || defined(__ppc__) || defined(__ppc64__)
94 static inline void sync_primitive(void)
96 /* Prevent reordering and/or merging of reads/writes to hardware.
97 * Such reordering and/or merging would break device accesses which
98 * depend on the exact access order.
100 asm("eieio" : : : "memory");
103 /* PCI port I/O is not yet implemented on PowerPC. */
104 int rget_io_perms(void)
109 #elif defined (__mips) || defined (__mips__) || defined (_mips) || defined (mips)
111 /* sync primitive is not needed because /dev/mem on MIPS uses uncached accesses
112 * in mode 2 which has a strongly ordered memory model.
114 static inline void sync_primitive(void)
118 /* PCI port I/O is not yet implemented on MIPS. */
119 int rget_io_perms(void)
124 #elif defined (__arm__)
126 static inline void sync_primitive(void)
130 int rget_io_perms(void)
137 #error Unknown architecture
141 void mmio_writeb(uint8_t val, void *addr)
143 *(volatile uint8_t *) addr = val;
147 void mmio_writew(uint16_t val, void *addr)
149 *(volatile uint16_t *) addr = val;
153 void mmio_writel(uint32_t val, void *addr)
155 *(volatile uint32_t *) addr = val;
159 uint8_t mmio_readb(void *addr)
161 return *(volatile uint8_t *) addr;
164 uint16_t mmio_readw(void *addr)
166 return *(volatile uint16_t *) addr;
169 uint32_t mmio_readl(void *addr)
171 return *(volatile uint32_t *) addr;
174 void mmio_readn(void *addr, uint8_t *buf, size_t len)
176 memcpy(buf, addr, len);
180 void mmio_le_writeb(uint8_t val, void *addr)
182 mmio_writeb(cpu_to_le8(val), addr);
185 void mmio_le_writew(uint16_t val, void *addr)
187 mmio_writew(cpu_to_le16(val), addr);
190 void mmio_le_writel(uint32_t val, void *addr)
192 mmio_writel(cpu_to_le32(val), addr);
195 uint8_t mmio_le_readb(void *addr)
197 return le_to_cpu8(mmio_readb(addr));
200 uint16_t mmio_le_readw(void *addr)
202 return le_to_cpu16(mmio_readw(addr));
205 uint32_t mmio_le_readl(void *addr)
207 return le_to_cpu32(mmio_readl(addr));
210 enum mmio_write_type {
216 struct undo_mmio_write_data {
219 enum mmio_write_type type;
227 int undo_mmio_write(void *p)
229 struct undo_mmio_write_data *data = p;
230 msg_pdbg("Restoring MMIO space at %p\n", data->addr);
231 switch (data->type) {
232 case mmio_write_type_b:
233 mmio_writeb(data->bdata, data->addr);
235 case mmio_write_type_w:
236 mmio_writew(data->wdata, data->addr);
238 case mmio_write_type_l:
239 mmio_writel(data->ldata, data->addr);
242 /* p was allocated in register_undo_mmio_write. */
247 #define register_undo_mmio_write(a, c) \
249 struct undo_mmio_write_data *undo_mmio_write_data; \
250 undo_mmio_write_data = malloc(sizeof(struct undo_mmio_write_data)); \
251 if (!undo_mmio_write_data) { \
252 msg_gerr("Out of memory!\n"); \
255 undo_mmio_write_data->addr = a; \
256 undo_mmio_write_data->type = mmio_write_type_##c; \
257 undo_mmio_write_data->c##data = mmio_read##c(a); \
258 register_shutdown(undo_mmio_write, undo_mmio_write_data); \
261 #define register_undo_mmio_writeb(a) register_undo_mmio_write(a, b)
262 #define register_undo_mmio_writew(a) register_undo_mmio_write(a, w)
263 #define register_undo_mmio_writel(a) register_undo_mmio_write(a, l)
265 void rmmio_writeb(uint8_t val, void *addr)
267 register_undo_mmio_writeb(addr);
268 mmio_writeb(val, addr);
271 void rmmio_writew(uint16_t val, void *addr)
273 register_undo_mmio_writew(addr);
274 mmio_writew(val, addr);
277 void rmmio_writel(uint32_t val, void *addr)
279 register_undo_mmio_writel(addr);
280 mmio_writel(val, addr);
283 void rmmio_le_writeb(uint8_t val, void *addr)
285 register_undo_mmio_writeb(addr);
286 mmio_le_writeb(val, addr);
289 void rmmio_le_writew(uint16_t val, void *addr)
291 register_undo_mmio_writew(addr);
292 mmio_le_writew(val, addr);
295 void rmmio_le_writel(uint32_t val, void *addr)
297 register_undo_mmio_writel(addr);
298 mmio_le_writel(val, addr);
301 void rmmio_valb(void *addr)
303 register_undo_mmio_writeb(addr);
306 void rmmio_valw(void *addr)
308 register_undo_mmio_writew(addr);
311 void rmmio_vall(void *addr)
313 register_undo_mmio_writel(addr);