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/arch/powerpc/boot/ops.h

https://github.com/aicjofs/android_kernel_lge_v500_20d
C Header | 262 lines | 206 code | 41 blank | 15 comment | 10 complexity | 8d9810712c09283203713e5bf918b0e2 MD5 | raw file
  1/*
  2 * Global definition of all the bootwrapper operations.
  3 *
  4 * Author: Mark A. Greer <mgreer@mvista.com>
  5 *
  6 * 2006 (c) MontaVista Software, Inc.  This file is licensed under
  7 * the terms of the GNU General Public License version 2.  This program
  8 * is licensed "as is" without any warranty of any kind, whether express
  9 * or implied.
 10 */
 11#ifndef _PPC_BOOT_OPS_H_
 12#define _PPC_BOOT_OPS_H_
 13
 14#include <stddef.h>
 15#include "types.h"
 16#include "string.h"
 17
 18#define	COMMAND_LINE_SIZE	512
 19#define	MAX_PATH_LEN		256
 20#define	MAX_PROP_LEN		256 /* What should this be? */
 21
 22typedef void (*kernel_entry_t)(unsigned long r3, unsigned long r4, void *r5);
 23
 24/* Platform specific operations */
 25struct platform_ops {
 26	void	(*fixups)(void);
 27	void	(*image_hdr)(const void *);
 28	void *	(*malloc)(unsigned long size);
 29	void	(*free)(void *ptr);
 30	void *	(*realloc)(void *ptr, unsigned long size);
 31	void	(*exit)(void);
 32	void *	(*vmlinux_alloc)(unsigned long size);
 33};
 34extern struct platform_ops platform_ops;
 35
 36/* Device Tree operations */
 37struct dt_ops {
 38	void *	(*finddevice)(const char *name);
 39	int	(*getprop)(const void *phandle, const char *name, void *buf,
 40			const int buflen);
 41	int	(*setprop)(const void *phandle, const char *name,
 42			const void *buf, const int buflen);
 43	int (*del_node)(const void *phandle);
 44	void *(*get_parent)(const void *phandle);
 45	/* The node must not already exist. */
 46	void *(*create_node)(const void *parent, const char *name);
 47	void *(*find_node_by_prop_value)(const void *prev,
 48	                                 const char *propname,
 49	                                 const char *propval, int proplen);
 50	void *(*find_node_by_compatible)(const void *prev,
 51	                                 const char *compat);
 52	unsigned long (*finalize)(void);
 53	char *(*get_path)(const void *phandle, char *buf, int len);
 54};
 55extern struct dt_ops dt_ops;
 56
 57/* Console operations */
 58struct console_ops {
 59	int	(*open)(void);
 60	void	(*write)(const char *buf, int len);
 61	void	(*edit_cmdline)(char *buf, int len);
 62	void	(*close)(void);
 63	void	*data;
 64};
 65extern struct console_ops console_ops;
 66
 67/* Serial console operations */
 68struct serial_console_data {
 69	int		(*open)(void);
 70	void		(*putc)(unsigned char c);
 71	unsigned char	(*getc)(void);
 72	u8		(*tstc)(void);
 73	void		(*close)(void);
 74};
 75
 76struct loader_info {
 77	void *promptr;
 78	unsigned long initrd_addr, initrd_size;
 79	char *cmdline;
 80	int cmdline_len;
 81};
 82extern struct loader_info loader_info;
 83
 84void start(void);
 85void fdt_init(void *blob);
 86int serial_console_init(void);
 87int ns16550_console_init(void *devp, struct serial_console_data *scdp);
 88int mpsc_console_init(void *devp, struct serial_console_data *scdp);
 89int cpm_console_init(void *devp, struct serial_console_data *scdp);
 90int mpc5200_psc_console_init(void *devp, struct serial_console_data *scdp);
 91int uartlite_console_init(void *devp, struct serial_console_data *scdp);
 92void *simple_alloc_init(char *base, unsigned long heap_size,
 93			unsigned long granularity, unsigned long max_allocs);
 94extern void flush_cache(void *, unsigned long);
 95int dt_xlate_reg(void *node, int res, unsigned long *addr, unsigned long *size);
 96int dt_xlate_addr(void *node, u32 *buf, int buflen, unsigned long *xlated_addr);
 97int dt_is_compatible(void *node, const char *compat);
 98void dt_get_reg_format(void *node, u32 *naddr, u32 *nsize);
 99int dt_get_virtual_reg(void *node, void **addr, int nres);
100
101static inline void *finddevice(const char *name)
102{
103	return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
104}
105
106static inline int getprop(void *devp, const char *name, void *buf, int buflen)
107{
108	return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
109}
110
111static inline int setprop(void *devp, const char *name,
112                          const void *buf, int buflen)
113{
114	return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
115}
116#define setprop_val(devp, name, val) \
117	do { \
118		typeof(val) x = (val); \
119		setprop((devp), (name), &x, sizeof(x)); \
120	} while (0)
121
122static inline int setprop_str(void *devp, const char *name, const char *buf)
123{
124	if (dt_ops.setprop)
125		return dt_ops.setprop(devp, name, buf, strlen(buf) + 1);
126
127	return -1;
128}
129
130static inline int del_node(const void *devp)
131{
132	return dt_ops.del_node ? dt_ops.del_node(devp) : -1;
133}
134
135static inline void *get_parent(const char *devp)
136{
137	return dt_ops.get_parent ? dt_ops.get_parent(devp) : NULL;
138}
139
140static inline void *create_node(const void *parent, const char *name)
141{
142	return dt_ops.create_node ? dt_ops.create_node(parent, name) : NULL;
143}
144
145
146static inline void *find_node_by_prop_value(const void *prev,
147                                            const char *propname,
148                                            const char *propval, int proplen)
149{
150	if (dt_ops.find_node_by_prop_value)
151		return dt_ops.find_node_by_prop_value(prev, propname,
152		                                      propval, proplen);
153
154	return NULL;
155}
156
157static inline void *find_node_by_prop_value_str(const void *prev,
158                                                const char *propname,
159                                                const char *propval)
160{
161	return find_node_by_prop_value(prev, propname, propval,
162	                               strlen(propval) + 1);
163}
164
165static inline void *find_node_by_devtype(const void *prev,
166                                         const char *type)
167{
168	return find_node_by_prop_value_str(prev, "device_type", type);
169}
170
171static inline void *find_node_by_alias(const char *alias)
172{
173	void *devp = finddevice("/aliases");
174
175	if (devp) {
176		char path[MAX_PATH_LEN];
177		if (getprop(devp, alias, path, MAX_PATH_LEN) > 0)
178			return finddevice(path);
179	}
180
181	return NULL;
182}
183
184static inline void *find_node_by_compatible(const void *prev,
185                                            const char *compat)
186{
187	if (dt_ops.find_node_by_compatible)
188		return dt_ops.find_node_by_compatible(prev, compat);
189
190	return NULL;
191}
192
193void dt_fixup_memory(u64 start, u64 size);
194void dt_fixup_cpu_clocks(u32 cpufreq, u32 tbfreq, u32 busfreq);
195void dt_fixup_clock(const char *path, u32 freq);
196void dt_fixup_mac_address_by_alias(const char *alias, const u8 *addr);
197void dt_fixup_mac_address(u32 index, const u8 *addr);
198void __dt_fixup_mac_addresses(u32 startindex, ...);
199#define dt_fixup_mac_addresses(...) \
200	__dt_fixup_mac_addresses(0, __VA_ARGS__, NULL)
201
202
203static inline void *find_node_by_linuxphandle(const u32 linuxphandle)
204{
205	return find_node_by_prop_value(NULL, "linux,phandle",
206			(char *)&linuxphandle, sizeof(u32));
207}
208
209static inline char *get_path(const void *phandle, char *buf, int len)
210{
211	if (dt_ops.get_path)
212		return dt_ops.get_path(phandle, buf, len);
213
214	return NULL;
215}
216
217static inline void *malloc(unsigned long size)
218{
219	return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
220}
221
222static inline void free(void *ptr)
223{
224	if (platform_ops.free)
225		platform_ops.free(ptr);
226}
227
228static inline void exit(void)
229{
230	if (platform_ops.exit)
231		platform_ops.exit();
232	for(;;);
233}
234#define fatal(args...) { printf(args); exit(); }
235
236
237#define BSS_STACK(size) \
238	static char _bss_stack[size]; \
239	void *_platform_stack_top = _bss_stack + sizeof(_bss_stack);
240
241extern unsigned long timebase_period_ns;
242void udelay(long delay);
243
244extern char _start[];
245extern char __bss_start[];
246extern char _end[];
247extern char _vmlinux_start[];
248extern char _vmlinux_end[];
249extern char _initrd_start[];
250extern char _initrd_end[];
251extern char _dtb_start[];
252extern char _dtb_end[];
253
254static inline __attribute__((const))
255int __ilog2_u32(u32 n)
256{
257	int bit;
258	asm ("cntlzw %0,%1" : "=r" (bit) : "r" (n));
259	return 31 - bit;
260}
261
262#endif /* _PPC_BOOT_OPS_H_ */