Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 1 | /* |
| 2 | This software and ancillary information (herein called SOFTWARE ) |
| 3 | called LinuxBIOS is made available under the terms described |
| 4 | here. The SOFTWARE has been approved for release with associated |
| 5 | LA-CC Number 00-34 . Unless otherwise indicated, this SOFTWARE has |
| 6 | been authored by an employee or employees of the University of |
| 7 | California, operator of the Los Alamos National Laboratory under |
| 8 | Contract No. W-7405-ENG-36 with the U.S. Department of Energy. The |
| 9 | U.S. Government has rights to use, reproduce, and distribute this |
| 10 | SOFTWARE. The public may copy, distribute, prepare derivative works |
| 11 | and publicly display this SOFTWARE without charge, provided that this |
| 12 | Notice and any statement of authorship are reproduced on all copies. |
| 13 | Neither the Government nor the University makes any warranty, express |
| 14 | or implied, or assumes any liability or responsibility for the use of |
| 15 | this SOFTWARE. If SOFTWARE is modified to produce derivative works, |
| 16 | such modified SOFTWARE should be clearly marked, so as not to confuse |
| 17 | it with the version available from LANL. |
| 18 | */ |
| 19 | /* Copyright 2000, Ron Minnich, Advanced Computing Lab, LANL |
| 20 | * rminnich@lanl.gov |
| 21 | */ |
| 22 | |
| 23 | |
| 24 | /* |
| 25 | * C Bootstrap code for the LinuxBIOS |
| 26 | */ |
| 27 | |
| 28 | |
| 29 | #include <console/console.h> |
| 30 | #include <cpu/cpu.h> |
| 31 | #include <mem.h> |
| 32 | #include <version.h> |
| 33 | #include <smp/start_stop.h> |
| 34 | #include <boot/tables.h> |
| 35 | #include <part/sizeram.h> |
Eric Biederman | 5899fd8 | 2003-04-24 06:25:08 +0000 | [diff] [blame] | 36 | #include <device/device.h> |
| 37 | #include <device/pci.h> |
Eric Biederman | 9b4336c | 2003-07-19 04:28:22 +0000 | [diff] [blame^] | 38 | #include <delay.h> |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 39 | #if 0 |
| 40 | #include <part/mainboard.h> |
| 41 | #endif |
| 42 | #if 0 |
| 43 | #include <part/hard_reset.h> |
| 44 | #endif |
| 45 | #include <smp/atomic.h> |
| 46 | #include <boot/elf.h> |
| 47 | |
| 48 | |
| 49 | #ifndef CONFIG_MAX_PHYSICAL_CPUS |
| 50 | #define CONFIG_MAX_PHYSICAL_CPUS CONFIG_MAX_CPUS |
| 51 | #endif |
| 52 | |
| 53 | /* The processor map. |
| 54 | * Now that SMP is in linuxbios, and Linux counts on us |
| 55 | * giving accurate information about processors, we need a map |
| 56 | * of what processors are out there. This could be a bit mask, |
| 57 | * but we will be optimistic and hope we someday run on |
| 58 | * REALLY BIG SMPs. Also we may need more than one bit of |
| 59 | * info per processor at some point. I hope we don't need |
| 60 | * anything more complex than an int. |
| 61 | */ |
| 62 | static unsigned long processor_map[MAX_CPUS]; |
| 63 | |
| 64 | static struct mem_range *get_ramsize(void) |
| 65 | { |
| 66 | struct mem_range *mem = 0; |
| 67 | if (!mem) { |
| 68 | mem = sizeram(); |
| 69 | } |
| 70 | if (!mem) { |
| 71 | printk_err("No memory size information!\n"); |
| 72 | for(;;); |
| 73 | } |
| 74 | return mem; |
| 75 | } |
| 76 | |
| 77 | |
Eric Biederman | 9b4336c | 2003-07-19 04:28:22 +0000 | [diff] [blame^] | 78 | #if CONFIG_SMP == 1 |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 79 | /* Number of cpus that are currently running in linuxbios */ |
| 80 | static atomic_t active_cpus = ATOMIC_INIT(1); |
| 81 | |
| 82 | void secondary_cpu_init(void) |
| 83 | { |
| 84 | struct mem_range *mem; |
| 85 | unsigned long id; |
| 86 | int index; |
| 87 | |
| 88 | atomic_inc(&active_cpus); |
| 89 | printk_debug(__FUNCTION__ "\n"); |
| 90 | mem = get_ramsize(); |
| 91 | id = cpu_initialize(mem); |
| 92 | index = processor_index(id); |
| 93 | printk_debug(__FUNCTION__ " %d/%u\n", index, id); |
| 94 | processor_map[index] = CPU_ENABLED; |
| 95 | atomic_dec(&active_cpus); |
| 96 | stop_cpu(id); |
| 97 | } |
| 98 | |
| 99 | static void wait_for_other_cpus(void) |
| 100 | { |
| 101 | int old_active_count, active_count; |
| 102 | int i; |
| 103 | old_active_count = 1; |
| 104 | |
| 105 | active_count = atomic_read(&active_cpus); |
| 106 | while(active_count > 1) { |
| 107 | if (active_count != old_active_count) { |
| 108 | printk_info("Waiting for %d CPUS to stop\n", active_count); |
| 109 | old_active_count = active_count; |
| 110 | } |
| 111 | active_count = atomic_read(&active_cpus); |
| 112 | } |
| 113 | for(i = 0; i < MAX_CPUS; i++) { |
| 114 | if (!(processor_map[i] & CPU_ENABLED)) { |
Eric Biederman | 9b4336c | 2003-07-19 04:28:22 +0000 | [diff] [blame^] | 115 | printk_err("CPU %d did not initialize!\n", i); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 116 | processor_map[i] = 0; |
Eric Biederman | 9b4336c | 2003-07-19 04:28:22 +0000 | [diff] [blame^] | 117 | #warning "FIXME do I need a mainboard_cpu_fixup function?" |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 118 | } |
| 119 | } |
| 120 | printk_debug("All AP CPUs stopped\n"); |
| 121 | } |
| 122 | |
| 123 | #else /* SMP */ |
| 124 | #define wait_for_other_cpus() do {} while(0) |
| 125 | #endif /* SMP */ |
| 126 | |
| 127 | void hardwaremain(int boot_complete) |
| 128 | { |
| 129 | /* Processor ID of the BOOT cpu (i.e. the one running this code) */ |
| 130 | unsigned long boot_cpu; |
| 131 | int boot_index; |
| 132 | |
| 133 | /* the order here is a bit tricky. We don't want to do much of |
| 134 | * anything that uses config registers until after PciAllocateResources |
| 135 | * since that function also figures out what kind of config strategy |
| 136 | * to use (type 1 or type 2). |
| 137 | * so we turn on cache, then worry about PCI setup, then do other |
| 138 | * things, so that the other work can use the PciRead* and PciWrite* |
| 139 | * functions. |
| 140 | */ |
| 141 | struct mem_range *mem, *tmem; |
| 142 | struct lb_memory *lb_mem; |
| 143 | unsigned long totalmem; |
| 144 | |
| 145 | post_code(0x80); |
| 146 | /* displayinit MUST PRECEDE ALL PRINTK! */ |
| 147 | console_init(); |
| 148 | |
| 149 | post_code(0x39); |
| 150 | printk_notice("LinuxBIOS-%s%s %s %s...\n", |
| 151 | linuxbios_version, linuxbios_extra_version, linuxbios_build, |
| 152 | (boot_complete)?"rebooting":"booting"); |
| 153 | |
| 154 | post_code(0x40); |
| 155 | |
| 156 | #if 0 |
| 157 | /* If we have already booted attempt a hard reboot */ |
| 158 | if (boot_complete) { |
| 159 | hard_reset(); |
| 160 | } |
| 161 | #endif |
Eric Biederman | 9b4336c | 2003-07-19 04:28:22 +0000 | [diff] [blame^] | 162 | init_timer(); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 163 | |
Eric Biederman | 5268557 | 2003-05-19 19:16:21 +0000 | [diff] [blame] | 164 | /* pick how to scan the bus. This is first so we can get at memory size. */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 165 | printk_info("Finding PCI configuration type.\n"); |
| 166 | pci_set_method(); |
| 167 | post_code(0x5f); |
| 168 | #if 0 |
| 169 | enumerate_static_devices(); |
| 170 | #endif |
| 171 | dev_enumerate(); |
| 172 | post_code(0x66); |
Eric Biederman | 5268557 | 2003-05-19 19:16:21 +0000 | [diff] [blame] | 173 | /* Now do the real bus. |
| 174 | * We round the total ram up a lot for thing like the SISFB, which |
| 175 | * shares high memory with the CPU. |
| 176 | */ |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 177 | dev_configure(); |
| 178 | post_code(0x88); |
| 179 | |
| 180 | dev_enable(); |
Eric Biederman | 5268557 | 2003-05-19 19:16:21 +0000 | [diff] [blame] | 181 | |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 182 | dev_initialize(); |
| 183 | post_code(0x89); |
Eric Biederman | 8ca8d76 | 2003-04-22 19:02:15 +0000 | [diff] [blame] | 184 | |
| 185 | mem = get_ramsize(); |
| 186 | post_code(0x70); |
| 187 | totalmem = 0; |
| 188 | for(tmem = mem; tmem->sizek; tmem++) { |
| 189 | totalmem += tmem->sizek; |
| 190 | } |
| 191 | printk_info("totalram: %ldM\n", |
| 192 | (totalmem + 512) >> 10); /* Round to the nearest meg */ |
| 193 | |
| 194 | /* Fully initialize the cpu before configuring the bus */ |
| 195 | boot_cpu = cpu_initialize(mem); |
| 196 | boot_index = processor_index(boot_cpu); |
| 197 | printk_spew("BOOT CPU is %d\n", boot_cpu); |
| 198 | processor_map[boot_index] = CPU_BOOTPROCESSOR|CPU_ENABLED; |
| 199 | |
| 200 | /* Now start the other cpus initializing |
| 201 | * The sooner they start the sooner they stop. |
| 202 | */ |
| 203 | post_code(0x75); |
| 204 | startup_other_cpus(processor_map); |
| 205 | post_code(0x77); |
| 206 | |
| 207 | /* make certain we are the only cpu running in linuxBIOS */ |
| 208 | wait_for_other_cpus(); |
| 209 | |
| 210 | /* Now that we have collected all of our information |
| 211 | * write our configuration tables. |
| 212 | */ |
| 213 | lb_mem = write_tables(mem, processor_map); |
| 214 | |
| 215 | elfboot(lb_mem); |
| 216 | } |
| 217 | |