summaryrefslogtreecommitdiff
path: root/arch/powerpc/cpu/mpc824x/cpu.c
blob: 08f6a947f410435e33410a86a5889d82809ea121 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
/*
 * (C) Copyright 2000 - 2002
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

#include <config.h>
#include <mpc824x.h>
#include <common.h>
#include <command.h>

DECLARE_GLOBAL_DATA_PTR;

int checkcpu (void)
{
	unsigned int pvr = get_pvr ();
	unsigned int version = pvr >> 16;
	unsigned char revision;
	ulong clock = gd->cpu_clk;
	char buf[32];

	puts ("CPU:   ");

	switch (version) {
	case CPU_TYPE_8240:
		puts ("MPC8240");
		break;

	case CPU_TYPE_8245:
		puts ("MPC8245");
		break;

	default:
		return -1;		/*not valid for this source */
	}

	CONFIG_READ_BYTE (REVID, revision);

	if (revision) {
		printf (" Revision %d.%d",
			(revision & 0xf0) >> 4,
			(revision & 0x0f));
	} else {
		return -1;		/* no valid CPU revision info */
	}

	printf (" at %s MHz:", strmhz (buf, clock));

	printf (" %u kB I-Cache", checkicache () >> 10);
	printf (" %u kB D-Cache", checkdcache () >> 10);

	puts ("\n");

	return 0;
}

/* ------------------------------------------------------------------------- */
/* L1 i-cache                                                                */

int checkicache (void)
{
	 /*TODO*/
	 return 128 * 4 * 32;
};

/* ------------------------------------------------------------------------- */
/* L1 d-cache                                                                */

int checkdcache (void)
{
	 /*TODO*/
	 return 128 * 4 * 32;

};

/*------------------------------------------------------------------- */

int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
	ulong msr, addr;

	/* Interrupts and MMU off */
	__asm__ ("mtspr    81, 0");

	/* Interrupts and MMU off */
	__asm__ __volatile__ ("mfmsr    %0":"=r" (msr):);

	msr &= ~0x1030;
	__asm__ __volatile__ ("mtmsr    %0"::"r" (msr));

	/*
	 * Trying to execute the next instruction at a non-existing address
	 * should cause a machine check, resulting in reset
	 */
#ifdef CONFIG_SYS_RESET_ADDRESS
	addr = CONFIG_SYS_RESET_ADDRESS;
#else
	/*
	 * note: when CONFIG_SYS_MONITOR_BASE points to a RAM address,
	 * CONFIG_SYS_MONITOR_BASE - sizeof (ulong) is usually a valid
	 * address. Better pick an address known to be invalid on
	 * your system and assign it to CONFIG_SYS_RESET_ADDRESS.
	 * "(ulong)-1" used to be a good choice for many systems...
	 */
	addr = CONFIG_SYS_MONITOR_BASE - sizeof (ulong);
#endif
	((void (*)(void)) addr) ();
	return 1;

}

/* ------------------------------------------------------------------------- */

/*
 * Get timebase clock frequency (like cpu_clk in Hz)
 * This is the sys_logic_clk (memory bus) divided by 4
 */
unsigned long get_tbclk (void)
{
	return ((get_bus_freq (0) + 2L) / 4L);
}

/* ------------------------------------------------------------------------- */

/*
 * The MPC824x has an integrated PCI controller known as the MPC107.
 * The following are MPC107 Bridge Controller and PCI Support functions
 *
 */

/*
 *  This procedure reads a 32-bit address MPC107 register, and returns
 *  a 32 bit value.  It swaps the address to little endian before
 *  writing it to config address, and swaps the value to big endian
 *  before returning to the caller.
 */
unsigned int mpc824x_mpc107_getreg (unsigned int regNum)
{
	unsigned int temp;

	/* swap the addr. to little endian */
	*(volatile unsigned int *) CHRP_REG_ADDR = PCISWAP (regNum);
	temp = *(volatile unsigned int *) CHRP_REG_DATA;
	return PCISWAP (temp);		/* swap the data upon return */
}

/*
 *  This procedure writes a 32-bit address MPC107 register.  It swaps
 *  the address to little endian before writing it to config address.
 */

void mpc824x_mpc107_setreg (unsigned int regNum, unsigned int regVal)
{
	/* swap the addr. to little endian */
	*(volatile unsigned int *) CHRP_REG_ADDR = PCISWAP (regNum);
	*(volatile unsigned int *) CHRP_REG_DATA = PCISWAP (regVal);
	return;
}


/*
 *  Write a byte (8 bits) to a memory location.
 */
void mpc824x_mpc107_write8 (unsigned int addr, unsigned char data)
{
	*(unsigned char *) addr = data;
	__asm__ ("sync");
}

/*
 *  Write a word (16 bits) to a memory location after the value
 *  has been byte swapped (big to little endian or vice versa)
 */

void mpc824x_mpc107_write16 (unsigned int address, unsigned short data)
{
	*(volatile unsigned short *) address = BYTE_SWAP_16_BIT (data);
	__asm__ ("sync");
}

/*
 *  Write a long word (32 bits) to a memory location after the value
 *  has been byte swapped (big to little endian or vice versa)
 */

void mpc824x_mpc107_write32 (unsigned int address, unsigned int data)
{
	*(volatile unsigned int *) address = LONGSWAP (data);
	__asm__ ("sync");
}

/*
 *  Read a byte (8 bits) from a memory location.
 */
unsigned char mpc824x_mpc107_read8 (unsigned int addr)
{
	return *(volatile unsigned char *) addr;
}


/*
 *  Read a word (16 bits) from a memory location, and byte swap the
 *  value before returning to the caller.
 */
unsigned short mpc824x_mpc107_read16 (unsigned int address)
{
	unsigned short retVal;

	retVal = BYTE_SWAP_16_BIT (*(unsigned short *) address);
	return retVal;
}


/*
 *  Read a long word (32 bits) from a memory location, and byte
 *  swap the value before returning to the caller.
 */
unsigned int mpc824x_mpc107_read32 (unsigned int address)
{
	unsigned int retVal;

	retVal = LONGSWAP (*(unsigned int *) address);
	return (retVal);
}


/*
 *  Read a register in the Embedded Utilities Memory Block address
 *  space.
 *  Input: regNum - register number + utility base address.  Example,
 *         the base address of EPIC is 0x40000, the register number
 *	   being passed is 0x40000+the address of the target register.
 *	   (See epic.h for register addresses).
 *  Output:  The 32 bit little endian value of the register.
 */

unsigned int mpc824x_eummbar_read (unsigned int regNum)
{
	unsigned int temp;

	temp = *(volatile unsigned int *) (EUMBBAR_VAL + regNum);
	temp = PCISWAP (temp);
	return temp;
}


/*
 *  Write a value to a register in the Embedded Utilities Memory
 *  Block address space.
 *  Input: regNum - register number + utility base address.  Example,
 *                  the base address of EPIC is 0x40000, the register
 *	            number is 0x40000+the address of the target register.
 *	            (See epic.h for register addresses).
 *         regVal - value to be written to the register.
 */

void mpc824x_eummbar_write (unsigned int regNum, unsigned int regVal)
{
	*(volatile unsigned int *) (EUMBBAR_VAL + regNum) = PCISWAP (regVal);
	return;
}

/* ------------------------------------------------------------------------- */