1 files changed, 212 insertions, 0 deletions
diff --git a/arch/ppc/boot/simple/misc-prep.c b/arch/ppc/boot/simple/misc-prep.c
new file mode 100644
index 00000000000..75380ac4166
--- /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;
+}