- Initial checkin of the freebios2 tree

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@784 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 216 insertions, 0 deletions

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 <console/console.h>
+#include <cpu/cpu.h>
+#include <mem.h>
+#include <version.h>
+#include <smp/start_stop.h>
+#include <boot/tables.h>
+#include <part/sizeram.h>
+#include <device.h>
+#include <pci.h>
+#if 0
+#include <part/mainboard.h>
+#endif
+#if 0
+#include <part/hard_reset.h>
+#endif
+#include <smp/atomic.h>
+#include <boot/elf.h>
+
+
+#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);
+}
+