1 /* 1 /*
2 * Copyright (C) 2004 Florian Schirmer <jolt@ 2 * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org>
3 * Copyright (C) 2007 Aurelien Jarno <aurelie 3 * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net>
4 * Copyright (C) 2010-2012 Hauke Mehrtens <ha 4 * Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de>
5 * 5 *
6 * This program is free software; you can red 6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Publ 7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version. 9 * option) any later version.
10 * 10 *
11 * THIS SOFTWARE IS PROVIDED ``AS IS'' A 11 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
12 * WARRANTIES, INCLUDING, BUT NOT LIMITED 12 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS FOR A PARTICUL 13 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
14 * NO EVENT SHALL THE AUTHOR BE LIABL 14 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQU 15 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITU 16 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
17 * USE, DATA, OR PROFITS; OR BUSINESS INTER 17 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
18 * ANY THEORY OF LIABILITY, WHETHER IN CONTR 18 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISIN 19 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSS 20 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
21 * 21 *
22 * You should have received a copy of the GN 22 * You should have received a copy of the GNU General Public License along
23 * with this program; if not, write to the F 23 * with this program; if not, write to the Free Software Foundation, Inc.,
24 * 675 Mass Ave, Cambridge, MA 02139, USA. 24 * 675 Mass Ave, Cambridge, MA 02139, USA.
25 */ 25 */
26 26
27 #include <linux/init.h> 27 #include <linux/init.h>
28 #include <linux/types.h> 28 #include <linux/types.h>
29 #include <linux/kernel.h> 29 #include <linux/kernel.h>
30 #include <linux/memblock.h> 30 #include <linux/memblock.h>
31 #include <linux/spinlock.h> 31 #include <linux/spinlock.h>
32 #include <linux/ssb/ssb_driver_chipcommon.h> 32 #include <linux/ssb/ssb_driver_chipcommon.h>
33 #include <linux/ssb/ssb_regs.h> 33 #include <linux/ssb/ssb_regs.h>
34 #include <linux/smp.h> 34 #include <linux/smp.h>
35 #include <asm/bmips.h> 35 #include <asm/bmips.h>
36 #include <asm/bootinfo.h> 36 #include <asm/bootinfo.h>
37 #include <bcm47xx.h> 37 #include <bcm47xx.h>
38 #include <bcm47xx_board.h> 38 #include <bcm47xx_board.h>
39 #include "bcm47xx_private.h" 39 #include "bcm47xx_private.h"
40 40
41 static char bcm47xx_system_type[20] = "Broadco 41 static char bcm47xx_system_type[20] = "Broadcom BCM47XX";
42 42
43 const char *get_system_type(void) 43 const char *get_system_type(void)
44 { 44 {
45 return bcm47xx_system_type; 45 return bcm47xx_system_type;
46 } 46 }
47 47
48 __init void bcm47xx_set_system_type(u16 chip_i 48 __init void bcm47xx_set_system_type(u16 chip_id)
49 { 49 {
50 snprintf(bcm47xx_system_type, sizeof(b 50 snprintf(bcm47xx_system_type, sizeof(bcm47xx_system_type),
51 (chip_id > 0x9999) ? "Broadco 51 (chip_id > 0x9999) ? "Broadcom BCM%d" :
52 "Broadco 52 "Broadcom BCM%04X",
53 chip_id); 53 chip_id);
54 } 54 }
55 55
56 static unsigned long lowmem __initdata; 56 static unsigned long lowmem __initdata;
57 57
58 static __init void prom_init_mem(void) 58 static __init void prom_init_mem(void)
59 { 59 {
60 unsigned long mem; 60 unsigned long mem;
61 unsigned long max; 61 unsigned long max;
62 unsigned long off; 62 unsigned long off;
63 struct cpuinfo_mips *c = ¤t_cpu_ 63 struct cpuinfo_mips *c = ¤t_cpu_data;
64 64
65 /* Figure out memory size by finding a 65 /* Figure out memory size by finding aliases.
66 * 66 *
67 * We should theoretically use the map 67 * We should theoretically use the mapping from CFE using cfe_enummem().
68 * However as the BCM47XX is mostly us 68 * However as the BCM47XX is mostly used on low-memory systems, we
69 * want to reuse the memory used by CF 69 * want to reuse the memory used by CFE (around 4MB). That means cfe_*
70 * functions stop to work at some poin 70 * functions stop to work at some point during the boot, we should only
71 * call them at the beginning of the b 71 * call them at the beginning of the boot.
72 * 72 *
73 * BCM47XX uses 128MB for addressing t 73 * BCM47XX uses 128MB for addressing the ram, if the system contains
74 * less than that amount of ram it rem 74 * less than that amount of ram it remaps the ram more often into the
75 * available space. 75 * available space.
76 */ 76 */
77 77
78 /* Physical address, without mapping t 78 /* Physical address, without mapping to any kernel segment */
79 off = CPHYSADDR((unsigned long)prom_in 79 off = CPHYSADDR((unsigned long)prom_init);
80 80
81 /* Accessing memory after 128 MiB will 81 /* Accessing memory after 128 MiB will cause an exception */
82 max = 128 << 20; 82 max = 128 << 20;
83 83
84 for (mem = 1 << 20; mem < max; mem += 84 for (mem = 1 << 20; mem < max; mem += 1 << 20) {
85 /* Loop condition may be not e 85 /* Loop condition may be not enough, off may be over 1 MiB */
86 if (off + mem >= max) { 86 if (off + mem >= max) {
87 mem = max; 87 mem = max;
88 pr_debug("Assume 128MB 88 pr_debug("Assume 128MB RAM\n");
89 break; 89 break;
90 } 90 }
91 if (!memcmp((void *)prom_init, 91 if (!memcmp((void *)prom_init, (void *)prom_init + mem, 32))
92 break; 92 break;
93 } 93 }
94 lowmem = mem; 94 lowmem = mem;
95 95
96 /* Ignoring the last page when ddr siz 96 /* Ignoring the last page when ddr size is 128M. Cached
97 * accesses to last page is causing th 97 * accesses to last page is causing the processor to prefetch
98 * using address above 128M stepping o 98 * using address above 128M stepping out of the ddr address
99 * space. 99 * space.
100 */ 100 */
101 if (c->cputype == CPU_74K && (mem == ( 101 if (c->cputype == CPU_74K && (mem == (128 << 20)))
102 mem -= 0x1000; 102 mem -= 0x1000;
103 memblock_add(0, mem); 103 memblock_add(0, mem);
104 } 104 }
105 105
106 /* 106 /*
107 * This is the first serial on the chip common 107 * This is the first serial on the chip common core, it is at this position
108 * for sb (ssb) and ai (bcma) bus. 108 * for sb (ssb) and ai (bcma) bus.
109 */ 109 */
110 #define BCM47XX_SERIAL_ADDR (SSB_ENUM_BASE + S 110 #define BCM47XX_SERIAL_ADDR (SSB_ENUM_BASE + SSB_CHIPCO_UART0_DATA)
111 111
112 void __init prom_init(void) 112 void __init prom_init(void)
113 { 113 {
114 /* Cache CBR addr before CPU/DMA setup 114 /* Cache CBR addr before CPU/DMA setup */
115 bmips_cbr_addr = BMIPS_GET_CBR(); 115 bmips_cbr_addr = BMIPS_GET_CBR();
116 prom_init_mem(); 116 prom_init_mem();
117 setup_8250_early_printk_port(CKSEG1ADD 117 setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0);
118 } 118 }
119 119
120 #if defined(CONFIG_BCM47XX_BCMA) && defined(CO 120 #if defined(CONFIG_BCM47XX_BCMA) && defined(CONFIG_HIGHMEM)
121 121
122 #define EXTVBASE 0xc0000000 122 #define EXTVBASE 0xc0000000
123 #define ENTRYLO(x) ((pte_val(pfn_pte((x) 123 #define ENTRYLO(x) ((pte_val(pfn_pte((x) >> PFN_PTE_SHIFT, PAGE_KERNEL_UNCACHED)) >> 6) | 1)
124 124
125 #include <asm/tlbflush.h> 125 #include <asm/tlbflush.h>
126 126
127 /* Stripped version of tlb_init, with the call 127 /* Stripped version of tlb_init, with the call to build_tlb_refill_handler
128 * dropped. Calling it at this stage causes a 128 * dropped. Calling it at this stage causes a hang.
129 */ 129 */
130 static void early_tlb_init(void) 130 static void early_tlb_init(void)
131 { 131 {
132 write_c0_pagemask(PM_DEFAULT_MASK); 132 write_c0_pagemask(PM_DEFAULT_MASK);
133 write_c0_wired(0); 133 write_c0_wired(0);
134 temp_tlb_entry = current_cpu_data.tlbs 134 temp_tlb_entry = current_cpu_data.tlbsize - 1;
135 local_flush_tlb_all(); 135 local_flush_tlb_all();
136 } 136 }
137 137
138 void __init bcm47xx_prom_highmem_init(void) 138 void __init bcm47xx_prom_highmem_init(void)
139 { 139 {
140 unsigned long off = (unsigned long)pro 140 unsigned long off = (unsigned long)prom_init;
141 unsigned long extmem = 0; 141 unsigned long extmem = 0;
142 bool highmem_region = false; 142 bool highmem_region = false;
143 143
144 if (WARN_ON(bcm47xx_bus_type != BCM47X 144 if (WARN_ON(bcm47xx_bus_type != BCM47XX_BUS_TYPE_BCMA))
145 return; 145 return;
146 146
147 if (bcm47xx_bus.bcma.bus.chipinfo.id = 147 if (bcm47xx_bus.bcma.bus.chipinfo.id == BCMA_CHIP_ID_BCM4706)
148 highmem_region = true; 148 highmem_region = true;
149 149
150 if (lowmem != 128 << 20 || !highmem_re 150 if (lowmem != 128 << 20 || !highmem_region)
151 return; 151 return;
152 152
153 early_tlb_init(); 153 early_tlb_init();
154 154
155 /* Add one temporary TLB entry to map 155 /* Add one temporary TLB entry to map SDRAM Region 2.
156 * Physical Virtual 156 * Physical Virtual
157 * 0x80000000 0xc0000000 157 * 0x80000000 0xc0000000 (1st: 256MB)
158 * 0x90000000 0xd0000000 158 * 0x90000000 0xd0000000 (2nd: 256MB)
159 */ 159 */
160 add_temporary_entry(ENTRYLO(0x80000000 160 add_temporary_entry(ENTRYLO(0x80000000),
161 ENTRYLO(0x80000000 161 ENTRYLO(0x80000000 + (256 << 20)),
162 EXTVBASE, PM_256M) 162 EXTVBASE, PM_256M);
163 163
164 off = EXTVBASE + __pa(off); 164 off = EXTVBASE + __pa(off);
165 for (extmem = 128 << 20; extmem < 512 165 for (extmem = 128 << 20; extmem < 512 << 20; extmem <<= 1) {
166 if (!memcmp((void *)prom_init, 166 if (!memcmp((void *)prom_init, (void *)(off + extmem), 16))
167 break; 167 break;
168 } 168 }
169 extmem -= lowmem; 169 extmem -= lowmem;
170 170
171 early_tlb_init(); 171 early_tlb_init();
172 172
173 if (!extmem) 173 if (!extmem)
174 return; 174 return;
175 175
176 pr_warn("Found %lu MiB of extra memory 176 pr_warn("Found %lu MiB of extra memory, but highmem is unsupported yet!\n",
177 extmem >> 20); 177 extmem >> 20);
178 178
179 /* TODO: Register extra memory */ 179 /* TODO: Register extra memory */
180 } 180 }
181 181
182 #endif /* defined(CONFIG_BCM47XX_BCMA) && defi 182 #endif /* defined(CONFIG_BCM47XX_BCMA) && defined(CONFIG_HIGHMEM) */
183 183
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