Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2004 Florian Schirmer <jolt@tuxbox.org> |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 3 | * Copyright (C) 2007 Aurelien Jarno <aurelien@aurel32.net> |
Hauke Mehrtens | c47cc20 | 2012-10-03 11:34:17 +0000 | [diff] [blame] | 4 | * Copyright (C) 2010-2012 Hauke Mehrtens <hauke@hauke-m.de> |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 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> |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 28 | #include <linux/types.h> |
| 29 | #include <linux/kernel.h> |
| 30 | #include <linux/spinlock.h> |
Hauke Mehrtens | d3dce3d | 2012-10-03 11:34:16 +0000 | [diff] [blame] | 31 | #include <linux/smp.h> |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 32 | #include <asm/bootinfo.h> |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 33 | #include <asm/fw/cfe/cfe_api.h> |
| 34 | #include <asm/fw/cfe/cfe_error.h> |
Hauke Mehrtens | 84e8bb5 | 2013-09-18 13:29:58 +0200 | [diff] [blame] | 35 | #include <bcm47xx.h> |
| 36 | #include <bcm47xx_board.h> |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 37 | |
| 38 | static int cfe_cons_handle; |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 39 | |
Hauke Mehrtens | dd57328 | 2013-09-19 23:40:09 +0200 | [diff] [blame^] | 40 | static char bcm47xx_system_type[20] = "Broadcom BCM47XX"; |
Hauke Mehrtens | 84e8bb5 | 2013-09-18 13:29:58 +0200 | [diff] [blame] | 41 | |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 42 | const char *get_system_type(void) |
| 43 | { |
Hauke Mehrtens | dd57328 | 2013-09-19 23:40:09 +0200 | [diff] [blame^] | 44 | return bcm47xx_system_type; |
| 45 | } |
Hauke Mehrtens | 84e8bb5 | 2013-09-18 13:29:58 +0200 | [diff] [blame] | 46 | |
Hauke Mehrtens | dd57328 | 2013-09-19 23:40:09 +0200 | [diff] [blame^] | 47 | __init void bcm47xx_set_system_type(u16 chip_id) |
| 48 | { |
| 49 | snprintf(bcm47xx_system_type, sizeof(bcm47xx_system_type), |
| 50 | (chip_id > 0x9999) ? "Broadcom BCM%d" : |
| 51 | "Broadcom BCM%04X", |
| 52 | chip_id); |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 53 | } |
| 54 | |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 55 | void prom_putchar(char c) |
| 56 | { |
| 57 | while (cfe_write(cfe_cons_handle, &c, 1) == 0) |
| 58 | ; |
| 59 | } |
| 60 | |
| 61 | static __init void prom_init_cfe(void) |
| 62 | { |
| 63 | uint32_t cfe_ept; |
| 64 | uint32_t cfe_handle; |
| 65 | uint32_t cfe_eptseal; |
| 66 | int argc = fw_arg0; |
| 67 | char **envp = (char **) fw_arg2; |
| 68 | int *prom_vec = (int *) fw_arg3; |
| 69 | |
| 70 | /* |
| 71 | * Check if a loader was used; if NOT, the 4 arguments are |
| 72 | * what CFE gives us (handle, 0, EPT and EPTSEAL) |
| 73 | */ |
| 74 | if (argc < 0) { |
| 75 | cfe_handle = (uint32_t)argc; |
| 76 | cfe_ept = (uint32_t)envp; |
| 77 | cfe_eptseal = (uint32_t)prom_vec; |
| 78 | } else { |
| 79 | if ((int)prom_vec < 0) { |
| 80 | /* |
| 81 | * Old loader; all it gives us is the handle, |
| 82 | * so use the "known" entrypoint and assume |
| 83 | * the seal. |
| 84 | */ |
| 85 | cfe_handle = (uint32_t)prom_vec; |
| 86 | cfe_ept = 0xBFC00500; |
| 87 | cfe_eptseal = CFE_EPTSEAL; |
| 88 | } else { |
| 89 | /* |
| 90 | * Newer loaders bundle the handle/ept/eptseal |
| 91 | * Note: prom_vec is in the loader's useg |
| 92 | * which is still alive in the TLB. |
| 93 | */ |
| 94 | cfe_handle = prom_vec[0]; |
| 95 | cfe_ept = prom_vec[2]; |
| 96 | cfe_eptseal = prom_vec[3]; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | if (cfe_eptseal != CFE_EPTSEAL) { |
| 101 | /* too early for panic to do any good */ |
| 102 | printk(KERN_ERR "CFE's entrypoint seal doesn't match."); |
| 103 | while (1) ; |
| 104 | } |
| 105 | |
| 106 | cfe_init(cfe_handle, cfe_ept); |
| 107 | } |
| 108 | |
| 109 | static __init void prom_init_console(void) |
| 110 | { |
| 111 | /* Initialize CFE console */ |
| 112 | cfe_cons_handle = cfe_getstdhandle(CFE_STDHANDLE_CONSOLE); |
| 113 | } |
| 114 | |
| 115 | static __init void prom_init_cmdline(void) |
| 116 | { |
Dmitri Vorobiev | 7580c9c | 2009-10-13 23:43:24 +0300 | [diff] [blame] | 117 | static char buf[COMMAND_LINE_SIZE] __initdata; |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 118 | |
| 119 | /* Get the kernel command line from CFE */ |
Dmitri Vorobiev | 7580c9c | 2009-10-13 23:43:24 +0300 | [diff] [blame] | 120 | if (cfe_getenv("LINUX_CMDLINE", buf, COMMAND_LINE_SIZE) >= 0) { |
| 121 | buf[COMMAND_LINE_SIZE - 1] = 0; |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 122 | strcpy(arcs_cmdline, buf); |
| 123 | } |
| 124 | |
| 125 | /* Force a console handover by adding a console= argument if needed, |
| 126 | * as CFE is not available anymore later in the boot process. */ |
| 127 | if ((strstr(arcs_cmdline, "console=")) == NULL) { |
| 128 | /* Try to read the default serial port used by CFE */ |
Dmitri Vorobiev | 7580c9c | 2009-10-13 23:43:24 +0300 | [diff] [blame] | 129 | if ((cfe_getenv("BOOT_CONSOLE", buf, COMMAND_LINE_SIZE) < 0) |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 130 | || (strncmp("uart", buf, 4))) |
| 131 | /* Default to uart0 */ |
| 132 | strcpy(buf, "uart0"); |
| 133 | |
| 134 | /* Compute the new command line */ |
Dmitri Vorobiev | 7580c9c | 2009-10-13 23:43:24 +0300 | [diff] [blame] | 135 | snprintf(arcs_cmdline, COMMAND_LINE_SIZE, "%s console=ttyS%c,115200", |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 136 | arcs_cmdline, buf[4]); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | static __init void prom_init_mem(void) |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 141 | { |
| 142 | unsigned long mem; |
Hauke Mehrtens | aec9222 | 2010-07-27 22:12:43 +0200 | [diff] [blame] | 143 | unsigned long max; |
Hauke Mehrtens | c47cc20 | 2012-10-03 11:34:17 +0000 | [diff] [blame] | 144 | unsigned long off; |
Hauke Mehrtens | d3dce3d | 2012-10-03 11:34:16 +0000 | [diff] [blame] | 145 | struct cpuinfo_mips *c = ¤t_cpu_data; |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 146 | |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 147 | /* Figure out memory size by finding aliases. |
| 148 | * |
| 149 | * We should theoretically use the mapping from CFE using cfe_enummem(). |
| 150 | * However as the BCM47XX is mostly used on low-memory systems, we |
| 151 | * want to reuse the memory used by CFE (around 4MB). That means cfe_* |
| 152 | * functions stop to work at some point during the boot, we should only |
| 153 | * call them at the beginning of the boot. |
Hauke Mehrtens | aec9222 | 2010-07-27 22:12:43 +0200 | [diff] [blame] | 154 | * |
| 155 | * BCM47XX uses 128MB for addressing the ram, if the system contains |
| 156 | * less that that amount of ram it remaps the ram more often into the |
| 157 | * available space. |
| 158 | * Accessing memory after 128MB will cause an exception. |
| 159 | * max contains the biggest possible address supported by the platform. |
| 160 | * If the method wants to try something above we assume 128MB ram. |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 161 | */ |
Hauke Mehrtens | c47cc20 | 2012-10-03 11:34:17 +0000 | [diff] [blame] | 162 | off = (unsigned long)prom_init; |
| 163 | max = off | ((128 << 20) - 1); |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 164 | for (mem = (1 << 20); mem < (128 << 20); mem += (1 << 20)) { |
Hauke Mehrtens | c47cc20 | 2012-10-03 11:34:17 +0000 | [diff] [blame] | 165 | if ((off + mem) > max) { |
Hauke Mehrtens | aec9222 | 2010-07-27 22:12:43 +0200 | [diff] [blame] | 166 | mem = (128 << 20); |
| 167 | printk(KERN_DEBUG "assume 128MB RAM\n"); |
| 168 | break; |
| 169 | } |
Hauke Mehrtens | c47cc20 | 2012-10-03 11:34:17 +0000 | [diff] [blame] | 170 | if (!memcmp(prom_init, prom_init + mem, 32)) |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 171 | break; |
| 172 | } |
| 173 | |
Hauke Mehrtens | d3dce3d | 2012-10-03 11:34:16 +0000 | [diff] [blame] | 174 | /* Ignoring the last page when ddr size is 128M. Cached |
| 175 | * accesses to last page is causing the processor to prefetch |
| 176 | * using address above 128M stepping out of the ddr address |
| 177 | * space. |
| 178 | */ |
| 179 | if (c->cputype == CPU_74K && (mem == (128 << 20))) |
| 180 | mem -= 0x1000; |
| 181 | |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 182 | add_memory_region(0, mem, BOOT_MEM_RAM); |
| 183 | } |
| 184 | |
Aurelien Jarno | 25e5fb9 | 2007-09-25 15:41:24 +0200 | [diff] [blame] | 185 | void __init prom_init(void) |
| 186 | { |
| 187 | prom_init_cfe(); |
| 188 | prom_init_console(); |
| 189 | prom_init_cmdline(); |
| 190 | prom_init_mem(); |
| 191 | } |
| 192 | |
Aurelien Jarno | 1c0c13e | 2007-09-25 15:40:12 +0200 | [diff] [blame] | 193 | void __init prom_free_prom_memory(void) |
| 194 | { |
| 195 | } |