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1c0c13eb AJ |
1 | /* |
2 | * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> | |
25e5fb97 | 3 | * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net> |
c47cc20c | 4 | * Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de> |
1c0c13eb AJ |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. | |
10 | * | |
11 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
12 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN | |
14 | * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
15 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
16 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF | |
17 | * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON | |
18 | * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
19 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
20 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | */ | |
26 | ||
27 | #include <linux/init.h> | |
25e5fb97 AJ |
28 | #include <linux/types.h> |
29 | #include <linux/kernel.h> | |
30 | #include <linux/spinlock.h> | |
e1ccbb65 HM |
31 | #include <linux/ssb/ssb_driver_chipcommon.h> |
32 | #include <linux/ssb/ssb_regs.h> | |
d3dce3d6 | 33 | #include <linux/smp.h> |
1c0c13eb | 34 | #include <asm/bootinfo.h> |
84e8bb5e HM |
35 | #include <bcm47xx.h> |
36 | #include <bcm47xx_board.h> | |
25e5fb97 | 37 | |
1c0c13eb | 38 | |
dd573285 | 39 | static char bcm47xx_system_type[20] = "Broadcom BCM47XX"; |
84e8bb5e | 40 | |
1c0c13eb AJ |
41 | const char *get_system_type(void) |
42 | { | |
dd573285 HM |
43 | return bcm47xx_system_type; |
44 | } | |
84e8bb5e | 45 | |
dd573285 HM |
46 | __init void bcm47xx_set_system_type(u16 chip_id) |
47 | { | |
48 | snprintf(bcm47xx_system_type, sizeof(bcm47xx_system_type), | |
49 | (chip_id > 0x9999) ? "Broadcom BCM%d" : | |
50 | "Broadcom BCM%04X", | |
51 | chip_id); | |
1c0c13eb AJ |
52 | } |
53 | ||
25e5fb97 | 54 | static __init void prom_init_mem(void) |
1c0c13eb AJ |
55 | { |
56 | unsigned long mem; | |
aec92225 | 57 | unsigned long max; |
c47cc20c | 58 | unsigned long off; |
d3dce3d6 | 59 | struct cpuinfo_mips *c = ¤t_cpu_data; |
1c0c13eb | 60 | |
25e5fb97 AJ |
61 | /* Figure out memory size by finding aliases. |
62 | * | |
63 | * We should theoretically use the mapping from CFE using cfe_enummem(). | |
64 | * However as the BCM47XX is mostly used on low-memory systems, we | |
65 | * want to reuse the memory used by CFE (around 4MB). That means cfe_* | |
66 | * functions stop to work at some point during the boot, we should only | |
67 | * call them at the beginning of the boot. | |
aec92225 HM |
68 | * |
69 | * BCM47XX uses 128MB for addressing the ram, if the system contains | |
70 | * less that that amount of ram it remaps the ram more often into the | |
71 | * available space. | |
72 | * Accessing memory after 128MB will cause an exception. | |
73 | * max contains the biggest possible address supported by the platform. | |
74 | * If the method wants to try something above we assume 128MB ram. | |
25e5fb97 | 75 | */ |
c47cc20c HM |
76 | off = (unsigned long)prom_init; |
77 | max = off | ((128 << 20) - 1); | |
1c0c13eb | 78 | for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) { |
c47cc20c | 79 | if ((off + mem) > max) { |
aec92225 HM |
80 | mem = (128 << 20); |
81 | printk(KERN_DEBUG "assume 128MB RAM\n"); | |
82 | break; | |
83 | } | |
c47cc20c | 84 | if (!memcmp(prom_init, prom_init + mem, 32)) |
1c0c13eb AJ |
85 | break; |
86 | } | |
87 | ||
d3dce3d6 HM |
88 | /* Ignoring the last page when ddr size is 128M. Cached |
89 | * accesses to last page is causing the processor to prefetch | |
90 | * using address above 128M stepping out of the ddr address | |
91 | * space. | |
92 | */ | |
93 | if (c->cputype == CPU_74K && (mem == (128 << 20))) | |
94 | mem -= 0x1000; | |
95 | ||
1c0c13eb AJ |
96 | add_memory_region(0, mem, BOOT_MEM_RAM); |
97 | } | |
98 | ||
e1ccbb65 HM |
99 | /* |
100 | * This is the first serial on the chip common core, it is at this position | |
101 | * for sb (ssb) and ai (bcma) bus. | |
102 | */ | |
103 | #define BCM47XX_SERIAL_ADDR (SSB_ENUM_BASE + SSB_CHIPCO_UART0_DATA) | |
104 | ||
25e5fb97 AJ |
105 | void __init prom_init(void) |
106 | { | |
25e5fb97 | 107 | prom_init_mem(); |
e1ccbb65 | 108 | setup_8250_early_printk_port(CKSEG1ADDR(BCM47XX_SERIAL_ADDR), 0, 0); |
25e5fb97 AJ |
109 | } |
110 | ||
1c0c13eb AJ |
111 | void __init prom_free_prom_memory(void) |
112 | { | |
113 | } |