1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2006,2009-2010 Freescale Semiconductor, Inc.
4 * Jeff Brown
5 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
6 */
7
8 #include <common.h>
9 #include <cpu_func.h>
10 #include <log.h>
11 #include <time.h>
12 #include <vsprintf.h>
13 #include <watchdog.h>
14 #include <command.h>
15 #include <asm/cache.h>
16 #include <asm/global_data.h>
17 #include <asm/mmu.h>
18 #include <mpc86xx.h>
19 #include <asm/fsl_law.h>
20 #include <asm/ppc.h>
21
22 DECLARE_GLOBAL_DATA_PTR;
23
24 /*
25 * Default board reset function
26 */
27 static void
__board_reset(void)28 __board_reset(void)
29 {
30 /* Do nothing */
31 }
32 void board_reset(void) __attribute__((weak, alias("__board_reset")));
33
34
35 int
checkcpu(void)36 checkcpu(void)
37 {
38 sys_info_t sysinfo;
39 uint pvr, svr;
40 uint major, minor;
41 char buf1[32], buf2[32];
42 volatile immap_t *immap = (immap_t *) CONFIG_SYS_IMMR;
43 volatile ccsr_gur_t *gur = &immap->im_gur;
44 struct cpu_type *cpu;
45 uint msscr0 = mfspr(MSSCR0);
46
47 svr = get_svr();
48 major = SVR_MAJ(svr);
49 minor = SVR_MIN(svr);
50
51 if (cpu_numcores() > 1) {
52 #ifndef CONFIG_MP
53 puts("Unicore software on multiprocessor system!!\n"
54 "To enable mutlticore build define CONFIG_MP\n");
55 #endif
56 }
57 puts("CPU: ");
58
59 cpu = gd->arch.cpu;
60
61 puts(cpu->name);
62
63 printf(", Version: %d.%d, (0x%08x)\n", major, minor, svr);
64 puts("Core: ");
65
66 pvr = get_pvr();
67 major = PVR_E600_MAJ(pvr);
68 minor = PVR_E600_MIN(pvr);
69
70 printf("e600 Core %d", (msscr0 & 0x20) ? 1 : 0);
71 if (gur->pordevsr & MPC86xx_PORDEVSR_CORE1TE)
72 puts("\n Core1Translation Enabled");
73 debug(" (MSSCR0=%x, PORDEVSR=%x)", msscr0, gur->pordevsr);
74
75 printf(", Version: %d.%d, (0x%08x)\n", major, minor, pvr);
76
77 get_sys_info(&sysinfo);
78
79 puts("Clock Configuration:\n");
80 printf(" CPU:%-4s MHz, ", strmhz(buf1, sysinfo.freq_processor));
81 printf("MPX:%-4s MHz\n", strmhz(buf1, sysinfo.freq_systembus));
82 printf(" DDR:%-4s MHz (%s MT/s data rate), ",
83 strmhz(buf1, sysinfo.freq_systembus / 2),
84 strmhz(buf2, sysinfo.freq_systembus));
85
86 if (sysinfo.freq_localbus > LCRR_CLKDIV) {
87 printf("LBC:%-4s MHz\n", strmhz(buf1, sysinfo.freq_localbus));
88 } else {
89 printf("LBC: unknown (LCRR[CLKDIV] = 0x%02lx)\n",
90 sysinfo.freq_localbus);
91 }
92
93 puts("L1: D-cache 32 KiB enabled\n");
94 puts(" I-cache 32 KiB enabled\n");
95
96 puts("L2: ");
97 if (get_l2cr() & 0x80000000) {
98 #if defined(CONFIG_ARCH_MPC8610)
99 puts("256");
100 #elif defined(CONFIG_ARCH_MPC8641)
101 puts("512");
102 #endif
103 puts(" KiB enabled\n");
104 } else {
105 puts("Disabled\n");
106 }
107
108 return 0;
109 }
110
111
do_reset(struct cmd_tbl * cmdtp,int flag,int argc,char * const argv[])112 int do_reset(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
113 {
114 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
115 volatile ccsr_gur_t *gur = &immap->im_gur;
116
117 /* Attempt board-specific reset */
118 board_reset();
119
120 /* Next try asserting HRESET_REQ */
121 out_be32(&gur->rstcr, MPC86xx_RSTCR_HRST_REQ);
122
123 while (1)
124 ;
125
126 return 1;
127 }
128
129
130 /*
131 * Get timebase clock frequency
132 */
133 unsigned long
get_tbclk(void)134 get_tbclk(void)
135 {
136 sys_info_t sys_info;
137
138 get_sys_info(&sys_info);
139 return (sys_info.freq_systembus + 3L) / 4L;
140 }
141
142
143 #if defined(CONFIG_WATCHDOG)
144 void
watchdog_reset(void)145 watchdog_reset(void)
146 {
147 #if defined(CONFIG_ARCH_MPC8610)
148 /*
149 * This actually feed the hard enabled watchdog.
150 */
151 volatile immap_t *immap = (immap_t *)CONFIG_SYS_IMMR;
152 volatile ccsr_wdt_t *wdt = &immap->im_wdt;
153 volatile ccsr_gur_t *gur = &immap->im_gur;
154 u32 tmp = gur->pordevsr;
155
156 if (tmp & 0x4000) {
157 wdt->swsrr = 0x556c;
158 wdt->swsrr = 0xaa39;
159 }
160 #endif
161 }
162 #endif /* CONFIG_WATCHDOG */
163
164 /*
165 * Print out the state of various machine registers.
166 * Currently prints out LAWs, BR0/OR0, and BATs
167 */
print_reginfo(void)168 void print_reginfo(void)
169 {
170 print_bats();
171 print_laws();
172 print_lbc_regs();
173 }
174
175 /*
176 * Set the DDR BATs to reflect the actual size of DDR.
177 *
178 * dram_size is the actual size of DDR, in bytes
179 *
180 * Note: we assume that CONFIG_MAX_MEM_MAPPED is 2G or smaller as we only
181 * are using a single BAT to cover DDR.
182 *
183 * If this is not true, (e.g. CONFIG_MAX_MEM_MAPPED is 2GB but HID0_XBSEN
184 * is not defined) then we might have a situation where U-Boot will attempt
185 * to relocated itself outside of the region mapped by DBAT0.
186 * This will cause a machine check.
187 *
188 * Currently we are limited to power of two sized DDR since we only use a
189 * single bat. If a non-power of two size is used that is less than
190 * CONFIG_MAX_MEM_MAPPED u-boot will crash.
191 *
192 */
setup_ddr_bat(phys_addr_t dram_size)193 void setup_ddr_bat(phys_addr_t dram_size)
194 {
195 unsigned long batu, bl;
196
197 bl = TO_BATU_BL(min(dram_size, CONFIG_MAX_MEM_MAPPED));
198
199 if (BATU_SIZE(bl) != dram_size) {
200 u64 sz = (u64)dram_size - BATU_SIZE(bl);
201 print_size(sz, " left unmapped\n");
202 }
203
204 batu = bl | BATU_VS | BATU_VP;
205 write_bat(DBAT0, batu, CONFIG_SYS_DBAT0L);
206 write_bat(IBAT0, batu, CONFIG_SYS_IBAT0L);
207 }
208