3 * Josh Huber, Mission Critical Linux, Inc. <huber@mclx.com>
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * 74xx/7xx specific definitions
33 /*----------------------------------------------------------------
34 * Exception offsets (PowerPC standard)
36 #define EXC_OFF_SYS_RESET 0x0100 /* default system reset offset */
38 /*----------------------------------------------------------------
43 #define L2CR_L2E 0x80000000 /* bit 0 - enable */
44 #define L2CR_L2PE 0x40000000 /* bit 1 - data parity */
45 #define L2CR_L2SIZ_2M 0x00000000 /* bits 2-3 - 2MB, MPC7400 only! */
46 #define L2CR_L2SIZ_1M 0x30000000 /* ... 1MB */
47 #define L2CR_L2SIZ_HM 0x20000000 /* ... 512K */
48 #define L2CR_L2SIZ_QM 0x10000000 /* ... 256k */
49 #define L2CR_L2CLK_1 0x02000000 /* bits 4-6 clock ratio div 1 */
50 #define L2CR_L2CLK_1_5 0x04000000 /* bits 4-6 clock ratio div 1.5 */
51 #define L2CR_L2CLK_2 0x08000000 /* bits 4-6 clock ratio div 2 */
52 #define L2CR_L2CLK_2_5 0x0a000000 /* bits 4-6 clock ratio div 2.5 */
53 #define L2CR_L2CLK_3 0x0c000000 /* bits 4-6 clock ratio div 3 */
54 #define L2CR_L2CLK_3_5 0x06000000 /* bits 4-6 clock ratio div 3.5 */
55 #define L2CR_L2CLK_4 0x0e000000 /* bits 4-6 clock ratio div 4 */
56 #define L2CR_L2RAM_BURST 0x01000000 /* bits 7-8 - burst SRAM */
57 #define L2CR_DO 0x00400000 /* bit 9 - enable caching of instr. in L2 */
58 #define L2CR_L2I 0x00200000 /* bit 10 - global invalidate bit */
59 #define L2CR_L2CTL 0x00100000 /* bit 11 - l2 ram control */
60 #define L2CR_L2WT 0x00080000 /* bit 12 - l2 write-through */
61 #define L2CR_TS 0x00040000 /* bit 13 - test support on */
62 #define L2CR_TS_OFF -L2CR_TS /* bit 13 - test support off */
63 #define L2CR_L2OH_5 0x00000000 /* bits 14-15 - output hold time = short */
64 #define L2CR_L2OH_1 0x00010000 /* bits 14-15 - output hold time = medium */
65 #define L2CR_L2OH_INV 0x00020000 /* bits 14-15 - output hold time = long */
66 #define L2CR_L2IP 0x00000001 /* global invalidate in progress */
68 /*----------------------------------------------------------------
69 * BAT settings. Look in config_<BOARD>.h for the actual setup
72 #define BATU_BL_128K 0x00000000
73 #define BATU_BL_256K 0x00000004
74 #define BATU_BL_512K 0x0000000c
75 #define BATU_BL_1M 0x0000001c
76 #define BATU_BL_2M 0x0000003c
77 #define BATU_BL_4M 0x0000007c
78 #define BATU_BL_8M 0x000000fc
79 #define BATU_BL_16M 0x000001fc
80 #define BATU_BL_32M 0x000003fc
81 #define BATU_BL_64M 0x000007fc
82 #define BATU_BL_128M 0x00000ffc
83 #define BATU_BL_256M 0x00001ffc
85 #define BATU_VS 0x00000002
86 #define BATU_VP 0x00000001
87 #define BATU_INVALID 0x00000000
89 #define BATL_WRITETHROUGH 0x00000040
90 #define BATL_CACHEINHIBIT 0x00000020
91 #define BATL_MEMCOHERENCE 0x00000010
92 #define BATL_GUARDEDSTORAGE 0x00000008
93 #define BATL_NO_ACCESS 0x00000000
95 #define BATL_PP_MSK 0x00000003
96 #define BATL_PP_00 0x00000000 /* No access */
97 #define BATL_PP_01 0x00000001 /* Read-only */
98 #define BATL_PP_10 0x00000002 /* Read-write */
99 #define BATL_PP_11 0x00000003
101 #define BATL_PP_NO_ACCESS BATL_PP_00
102 #define BATL_PP_RO BATL_PP_01
103 #define BATL_PP_RW BATL_PP_10
106 /* cpu ids we detect */
107 typedef enum __cpu_t {
111 CPU_750CX, CPU_750FX, CPU_750GX,
114 CPU_7450, CPU_7455, CPU_7457,
118 extern cpu_t get_cpu_type(void);
120 #define l1icache_enable icache_enable
122 void l2cache_enable(void);
123 void l1dcache_enable(void);
125 static __inline__ unsigned long get_msr (void)
128 asm volatile("mfmsr %0" : "=r" (msr) :);
132 static __inline__ void set_msr (unsigned long msr)
134 asm volatile("mtmsr %0" : : "r" (msr));
137 static __inline__ unsigned long get_hid0 (void)
140 asm volatile("mfspr %0, 1008" : "=r" (hid0) :);
144 static __inline__ unsigned long get_hid1 (void)
147 asm volatile("mfspr %0, 1009" : "=r" (hid1) :);
151 static __inline__ void set_hid0 (unsigned long hid0)
153 asm volatile("mtspr 1008, %0" : : "r" (hid0));
156 static __inline__ void set_hid1 (unsigned long hid1)
158 asm volatile("mtspr 1009, %0" : : "r" (hid1));
161 #endif /* __ASSEMBLY__ */
162 #endif /* __MPC74XX_H__ */