From 8ca8d7665d671e10d72b8fcb4d69121d75f7906e Mon Sep 17 00:00:00 2001 From: Eric Biederman Date: Tue, 22 Apr 2003 19:02:15 +0000 Subject: - Initial checkin of the freebios2 tree git-svn-id: svn://svn.coreboot.org/coreboot/trunk@784 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1 --- src/boot/hardwaremain.c | 216 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 src/boot/hardwaremain.c (limited to 'src/boot/hardwaremain.c') diff --git a/src/boot/hardwaremain.c b/src/boot/hardwaremain.c new file mode 100644 index 0000000000..3507f88f0a --- /dev/null +++ b/src/boot/hardwaremain.c @@ -0,0 +1,216 @@ +/* +This software and ancillary information (herein called SOFTWARE ) +called LinuxBIOS is made available under the terms described +here. The SOFTWARE has been approved for release with associated +LA-CC Number 00-34 . Unless otherwise indicated, this SOFTWARE has +been authored by an employee or employees of the University of +California, operator of the Los Alamos National Laboratory under +Contract No. W-7405-ENG-36 with the U.S. Department of Energy. The +U.S. Government has rights to use, reproduce, and distribute this +SOFTWARE. The public may copy, distribute, prepare derivative works +and publicly display this SOFTWARE without charge, provided that this +Notice and any statement of authorship are reproduced on all copies. +Neither the Government nor the University makes any warranty, express +or implied, or assumes any liability or responsibility for the use of +this SOFTWARE. If SOFTWARE is modified to produce derivative works, +such modified SOFTWARE should be clearly marked, so as not to confuse +it with the version available from LANL. + */ +/* Copyright 2000, Ron Minnich, Advanced Computing Lab, LANL + * rminnich@lanl.gov + */ + + +/* + * C Bootstrap code for the LinuxBIOS + */ + + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#if 0 +#include +#endif +#if 0 +#include +#endif +#include +#include + + +#ifndef CONFIG_MAX_PHYSICAL_CPUS +#define CONFIG_MAX_PHYSICAL_CPUS CONFIG_MAX_CPUS +#endif + +/* The processor map. + * Now that SMP is in linuxbios, and Linux counts on us + * giving accurate information about processors, we need a map + * of what processors are out there. This could be a bit mask, + * but we will be optimistic and hope we someday run on + * REALLY BIG SMPs. Also we may need more than one bit of + * info per processor at some point. I hope we don't need + * anything more complex than an int. + */ +static unsigned long processor_map[MAX_CPUS]; + +static struct mem_range *get_ramsize(void) +{ + struct mem_range *mem = 0; + if (!mem) { + mem = sizeram(); + } + if (!mem) { + printk_err("No memory size information!\n"); + for(;;); + } + return mem; +} + + +#if SMP == 1 +/* Number of cpus that are currently running in linuxbios */ +static atomic_t active_cpus = ATOMIC_INIT(1); + +void secondary_cpu_init(void) +{ + struct mem_range *mem; + unsigned long id; + int index; + + atomic_inc(&active_cpus); + printk_debug(__FUNCTION__ "\n"); + mem = get_ramsize(); + id = cpu_initialize(mem); + index = processor_index(id); + printk_debug(__FUNCTION__ " %d/%u\n", index, id); + processor_map[index] = CPU_ENABLED; + atomic_dec(&active_cpus); + stop_cpu(id); +} + +static void wait_for_other_cpus(void) +{ + int old_active_count, active_count; + int i; + old_active_count = 1; + + active_count = atomic_read(&active_cpus); + while(active_count > 1) { + if (active_count != old_active_count) { + printk_info("Waiting for %d CPUS to stop\n", active_count); + old_active_count = active_count; + } + active_count = atomic_read(&active_cpus); + } + for(i = 0; i < MAX_CPUS; i++) { + if (!(processor_map[i] & CPU_ENABLED)) { + printk_err("CPU %d/%u did not initialize!\n", + i, initial_apicid[i]); + processor_map[i] = 0; + mainboard_cpu_fixup(i); + } + } + printk_debug("All AP CPUs stopped\n"); +} + +#else /* SMP */ +#define wait_for_other_cpus() do {} while(0) +#endif /* SMP */ + +void hardwaremain(int boot_complete) +{ + /* Processor ID of the BOOT cpu (i.e. the one running this code) */ + unsigned long boot_cpu; + int boot_index; + + /* the order here is a bit tricky. We don't want to do much of + * anything that uses config registers until after PciAllocateResources + * since that function also figures out what kind of config strategy + * to use (type 1 or type 2). + * so we turn on cache, then worry about PCI setup, then do other + * things, so that the other work can use the PciRead* and PciWrite* + * functions. + */ + struct mem_range *mem, *tmem; + struct lb_memory *lb_mem; + unsigned long totalmem; + + post_code(0x80); + /* displayinit MUST PRECEDE ALL PRINTK! */ + console_init(); + + post_code(0x39); + printk_notice("LinuxBIOS-%s%s %s %s...\n", + linuxbios_version, linuxbios_extra_version, linuxbios_build, + (boot_complete)?"rebooting":"booting"); + + post_code(0x40); + +#if 0 + /* If we have already booted attempt a hard reboot */ + if (boot_complete) { + hard_reset(); + } +#endif +#if 1 + + // pick how to scan the bus. This is first so we can get at memory size. + printk_info("Finding PCI configuration type.\n"); + pci_set_method(); + post_code(0x5f); +#if 0 + enumerate_static_devices(); +#endif + dev_enumerate(); + post_code(0x66); + // Now do the real bus + // we round the total ram up a lot for thing like the SISFB, which + // shares high memory with the CPU. + dev_configure(); + post_code(0x88); + + dev_enable(); + dev_initialize(); + post_code(0x89); +#endif + + mem = get_ramsize(); + post_code(0x70); + totalmem = 0; + for(tmem = mem; tmem->sizek; tmem++) { + totalmem += tmem->sizek; + } + printk_info("totalram: %ldM\n", + (totalmem + 512) >> 10); /* Round to the nearest meg */ + + /* Fully initialize the cpu before configuring the bus */ + boot_cpu = cpu_initialize(mem); + boot_index = processor_index(boot_cpu); + printk_spew("BOOT CPU is %d\n", boot_cpu); + processor_map[boot_index] = CPU_BOOTPROCESSOR|CPU_ENABLED; + + /* Now start the other cpus initializing + * The sooner they start the sooner they stop. + */ + post_code(0x75); + startup_other_cpus(processor_map); + post_code(0x77); + + /* make certain we are the only cpu running in linuxBIOS */ + wait_for_other_cpus(); + + /* Now that we have collected all of our information + * write our configuration tables. + */ + lb_mem = write_tables(mem, processor_map); + + elfboot(lb_mem); +} + -- cgit v1.2.3