- First pass through with with device tree enhancement merge. Most of the mechanisms should

  be in place but don't expect anything to quite work yet.


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1662 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

1 files changed, 20 insertions, 156 deletions

diff --git a/src/boot/hardwaremain.c b/src/boot/hardwaremain.c
index efaf59519d..d292e5dcd4 100644
--- a/src/boot/hardwaremain.c
+++ b/src/boot/hardwaremain.c
@@ -27,129 +27,28 @@ it with the version available from LANL.
 
 
 #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/device.h>
 #include <device/pci.h>
 #include <device/chip.h>
 #include <delay.h>
+#include <stdlib.h>
 #include <part/hard_reset.h>
-#include <smp/atomic.h>
 #include <boot/elf.h>
 
-
-#ifndef CONFIG_MAX_PHYSICAL_CPUS
-#define CONFIG_MAX_PHYSICAL_CPUS CONFIG_MAX_CPUS
-#endif
-
-#if CONFIG_FS_STREAM == 1
-extern int filo(struct lb_memory *);
-#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[CONFIG_MAX_CPUS];
-
-static struct mem_range *get_ramsize(void)
-{
-	struct mem_range *mem = 0;
-	if (!mem) {
-		mem = sizeram();
-	}
-	if (!mem) {
-		printk_emerg("No memory size information!\n");
-		for(;;) {
-			/* Ensure this loop is not optimized away */
-			asm volatile("":/* outputs */:/*inputs */ :"memory");
-		}
-	}
-	return mem;
-}
-
-
-#if CONFIG_SMP == 1
-/* Number of cpus that are currently running in linuxbios */
-static atomic_t active_cpus = ATOMIC_INIT(1);
-
-/**
- * @brief Initialize secondary processors.
- *
- *
- * @todo move this into a method of per cpu data structure.
- */
-void secondary_cpu_init(void)
-{
-	struct mem_range *mem;
-	unsigned long id;
-	int index;
-
-	atomic_inc(&active_cpus);
-
-	printk_debug("%s\n", __FUNCTION__);
-	mem = get_ramsize();
-	id = cpu_initialize(mem);
-	index = processor_index(id);
-	printk_debug("%s  %d/%u\n", __FUNCTION__ , 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 < CONFIG_MAX_CPUS; i++) {
-		if (!(processor_map[i] & CPU_ENABLED)) {
-			printk_err("CPU %d did not initialize!\n", i);
-			processor_map[i] = 0;
-		}
-	}
-
-	printk_debug("All AP CPUs stopped\n");
-}
-
-#else /* CONIFG_SMP */
-#define wait_for_other_cpus() do {} while(0)
-#endif /* CONFIG_SMP */
-
-/**
- * @brief Main program of LinuxBIOS
- *
- * @param boot_complete
- */
 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;
-	struct mem_range *mem, *tmem;
+	/* 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 lb_memory *lb_mem;
-	unsigned long totalmem;
 
 	post_code(0x80);
 
@@ -160,8 +59,8 @@ void hardwaremain(int boot_complete)
 	
 	post_code(0x39);
 	printk_notice("LinuxBIOS-%s%s %s %s...\n", 
-		      linuxbios_version, linuxbios_extra_version,
-		      linuxbios_build, (boot_complete)?"rebooting":"booting");
+		linuxbios_version, linuxbios_extra_version, linuxbios_build,
+		(boot_complete)?"rebooting":"booting");
 
 	post_code(0x40);
 
@@ -172,66 +71,31 @@ void hardwaremain(int boot_complete)
 
 	CONFIGURE(CONF_PASS_PRE_PCI);
 
-	/* determine how software can generate PCI configuration transactions
-	 * in this system  */
+	/* 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);
-
-	/* convert static device structures into dynamic device structures
-	 * before probing dynamic devices. */
 	enumerate_static_devices();
-
-	/* probe the existence of dynamic devices and construct the dynamic
-	 * device tree. */
 	dev_enumerate();
 	post_code(0x66);
-
-	/* probe and assign the resources required by the dynamic devices */
+	/* 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);
 
-	/* enable the resources probed and assigned in dev_configure() */
 	dev_enable();
 
-	/* do the device specific init in additional to simple resources
-	 * allocation performed in dev_enable() */
 	dev_initialize();
 	post_code(0x89);
 
 	CONFIGURE(CONF_PASS_POST_PCI);
 
-	/* this is done last because some devices may 'steal' memory from
-	 * the system during device initialization. */
-	mem = get_ramsize();
-	post_code(0x70);
-	for (totalmem = 0, tmem = mem; tmem->sizek; tmem++) {
-		totalmem += tmem->sizek;
-	}
-	/* Round to the nearest mega */
-	printk_info("totalram: %ldM\n", (totalmem + 512) >> 10);
-
-	/* fully initialize the boot processor */
-	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;
-
-	/* start up other processors, it works like a pthread_create() or
-	 * fork(), instead of running the initialization code for all devices
-	 * as the boot processor, they start from secondary_cpu_init(), doing
-	 * cpu initialization only. */
-	post_code(0x75);
-	startup_other_cpus(processor_map);
-
-	/* like pthread_join() or wait(), wait other processors finishing
-	 * their execution of secondary_cpu_init() and 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);
+	/* Now that we have collected all of our information
+	 * write our configuration tables.
+	 */
+	lb_mem = write_tables();
 
 	CONFIGURE(CONF_PASS_PRE_BOOT);