Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/ppc/boot/simple/misc-prep.c b/arch/ppc/boot/simple/misc-prep.c
new file mode 100644
index 0000000..75380ac
--- /dev/null
+++ b/arch/ppc/boot/simple/misc-prep.c
@@ -0,0 +1,212 @@
+/*
+ * arch/ppc/boot/simple/misc-prep.c
+ *
+ * Maintainer: Tom Rini <trini@kernel.crashing.org>
+ *
+ * In the past: Gary Thomas, Cort Dougan <cort@cs.nmt.edu>
+ */
+
+#include <linux/config.h>
+#include <linux/pci_ids.h>
+#include <linux/types.h>
+#include <asm/residual.h>
+#include <asm/string.h>
+#include <asm/byteorder.h>
+#include "mpc10x.h"
+#include "of1275.h"
+#include "nonstdio.h"
+
+extern int keyb_present; /* keyboard controller is present by default */
+RESIDUAL hold_resid_buf;
+RESIDUAL *hold_residual = &hold_resid_buf;
+static void *OFW_interface; /* Pointer to OF, if available. */
+
+#ifdef CONFIG_VGA_CONSOLE
+char *vidmem = (char *)0xC00B8000;
+int lines = 25, cols = 80;
+int orig_x, orig_y = 24;
+#endif /* CONFIG_VGA_CONSOLE */
+
+extern int CRT_tstc(void);
+extern int vga_init(unsigned char *ISA_mem);
+extern void gunzip(void *, int, unsigned char *, int *);
+extern unsigned long serial_init(int chan, void *ignored);
+extern void serial_fixups(void);
+extern struct bi_record *decompress_kernel(unsigned long load_addr,
+ int num_words, unsigned long cksum);
+extern void disable_6xx_mmu(void);
+extern unsigned long mpc10x_get_mem_size(void);
+
+static void
+writel(unsigned int val, unsigned int address)
+{
+ /* Ensure I/O operations complete */
+ __asm__ volatile("eieio");
+ *(unsigned int *)address = cpu_to_le32(val);
+}
+
+#define PCI_CFG_ADDR(dev,off) ((0x80<<24) | (dev<<8) | (off&0xfc))
+#define PCI_CFG_DATA(off) (MPC10X_MAPA_CNFG_DATA+(off&3))
+
+static void
+pci_read_config_32(unsigned char devfn,
+ unsigned char offset,
+ unsigned int *val)
+{
+ /* Ensure I/O operations complete */
+ __asm__ volatile("eieio");
+ *(unsigned int *)PCI_CFG_ADDR(devfn,offset) =
+ cpu_to_le32(MPC10X_MAPA_CNFG_ADDR);
+ /* Ensure I/O operations complete */
+ __asm__ volatile("eieio");
+ *val = le32_to_cpu(*(unsigned int *)PCI_CFG_DATA(offset));
+ return;
+}
+
+#ifdef CONFIG_VGA_CONSOLE
+void
+scroll(void)
+{
+ int i;
+
+ memcpy ( vidmem, vidmem + cols * 2, ( lines - 1 ) * cols * 2 );
+ for ( i = ( lines - 1 ) * cols * 2; i < lines * cols * 2; i += 2 )
+ vidmem[i] = ' ';
+}
+#endif /* CONFIG_VGA_CONSOLE */
+
+unsigned long
+load_kernel(unsigned long load_addr, int num_words, unsigned long cksum,
+ RESIDUAL *residual, void *OFW)
+{
+ int start_multi = 0;
+ unsigned int pci_viddid, pci_did, tulip_pci_base, tulip_base;
+
+ /* If we have Open Firmware, initialise it immediately */
+ if (OFW) {
+ OFW_interface = OFW;
+ ofinit(OFW_interface);
+ }
+
+ board_isa_init();
+#if defined(CONFIG_VGA_CONSOLE)
+ vga_init((unsigned char *)0xC0000000);
+#endif /* CONFIG_VGA_CONSOLE */
+
+ if (residual) {
+ /* Is this Motorola PPCBug? */
+ if ((1 & residual->VitalProductData.FirmwareSupports) &&
+ (1 == residual->VitalProductData.FirmwareSupplier)) {
+ unsigned char base_mod;
+ unsigned char board_type = inb(0x801) & 0xF0;
+
+ /*
+ * Reset the onboard 21x4x Ethernet
+ * Motorola Ethernet is at IDSEL 14 (devfn 0x70)
+ */
+ pci_read_config_32(0x70, 0x00, &pci_viddid);
+ pci_did = (pci_viddid & 0xffff0000) >> 16;
+ /* Be sure we've really found a 21x4x chip */
+ if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_DEC) &&
+ ((pci_did == PCI_DEVICE_ID_DEC_TULIP_FAST) ||
+ (pci_did == PCI_DEVICE_ID_DEC_TULIP) ||
+ (pci_did == PCI_DEVICE_ID_DEC_TULIP_PLUS) ||
+ (pci_did == PCI_DEVICE_ID_DEC_21142))) {
+ pci_read_config_32(0x70,
+ 0x10,
+ &tulip_pci_base);
+ /* Get the physical base address */
+ tulip_base =
+ (tulip_pci_base & ~0x03UL) + 0x80000000;
+ /* Strobe the 21x4x reset bit in CSR0 */
+ writel(0x1, tulip_base);
+ }
+
+ /* If this is genesis 2 board then check for no
+ * keyboard controller and more than one processor.
+ */
+ if (board_type == 0xe0) {
+ base_mod = inb(0x803);
+ /* if a MVME2300/2400 or a Sitka then no keyboard */
+ if((base_mod == 0xFA) || (base_mod == 0xF9) ||
+ (base_mod == 0xE1)) {
+ keyb_present = 0; /* no keyboard */
+ }
+ }
+ /* If this is a multiprocessor system then
+ * park the other processor so that the
+ * kernel knows where to find them.
+ */
+ if (residual->MaxNumCpus > 1)
+ start_multi = 1;
+ }
+ memcpy(hold_residual,residual,sizeof(RESIDUAL));
+ }
+
+ /* Call decompress_kernel */
+ decompress_kernel(load_addr, num_words, cksum);
+
+ if (start_multi) {
+ residual->VitalProductData.SmpIar = (unsigned long)0xc0;
+ residual->Cpus[1].CpuState = CPU_GOOD;
+ hold_residual->VitalProductData.Reserved5 = 0xdeadbeef;
+ }
+
+ /* Now go and clear out the BATs and ensure that our MSR is
+ * correct .*/
+ disable_6xx_mmu();
+
+ /* Make r3 be a pointer to the residual data. */
+ return (unsigned long)hold_residual;
+}
+
+unsigned long
+get_mem_size(void)
+{
+ unsigned int pci_viddid, pci_did;
+
+ /* First, figure out what kind of host bridge we are on. If it's
+ * an MPC10x, we can ask it directly how much memory it has.
+ * Otherwise, see if the residual data has anything. This isn't
+ * the best way, but it can be the only way. If there's nothing,
+ * assume 32MB. -- Tom.
+ */
+ /* See what our host bridge is. */
+ pci_read_config_32(0x00, 0x00, &pci_viddid);
+ pci_did = (pci_viddid & 0xffff0000) >> 16;
+ /* See if we are on an MPC10x. */
+ if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
+ && ((pci_did == PCI_DEVICE_ID_MOTOROLA_MPC105)
+ || (pci_did == PCI_DEVICE_ID_MOTOROLA_MPC106)
+ || (pci_did == PCI_DEVICE_ID_MOTOROLA_MPC107)))
+ return mpc10x_get_mem_size();
+ /* If it's not, see if we have anything in the residual data. */
+ else if (hold_residual && hold_residual->TotalMemory)
+ return hold_residual->TotalMemory;
+ else if (OFW_interface) {
+ /*
+ * This is a 'best guess' check. We want to make sure
+ * we don't try this on a PReP box without OF
+ * -- Cort
+ */
+ while (OFW_interface)
+ {
+ phandle dev_handle;
+ int mem_info[2];
+
+ /* get handle to memory description */
+ if (!(dev_handle = finddevice("/memory@0")))
+ break;
+
+ /* get the info */
+ if (getprop(dev_handle, "reg", mem_info,
+ sizeof(mem_info)) != 8)
+ break;
+
+ return mem_info[1];
+ }
+ }
+
+ /* Fall back to hard-coding 32MB. */
+ return 32*1024*1024;
+}