aboutsummaryrefslogtreecommitdiff
path: root/arch/ppc/platforms/prep_setup.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/ppc/platforms/prep_setup.c')
-rw-r--r--arch/ppc/platforms/prep_setup.c1181
1 files changed, 1181 insertions, 0 deletions
diff --git a/arch/ppc/platforms/prep_setup.c b/arch/ppc/platforms/prep_setup.c
new file mode 100644
index 00000000000..bc926be9547
--- /dev/null
+++ b/arch/ppc/platforms/prep_setup.c
@@ -0,0 +1,1181 @@
+/*
+ * arch/ppc/platforms/setup.c
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Adapted from 'alpha' version by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu)
+ *
+ * Support for PReP (Motorola MTX/MVME)
+ * by Troy Benjegerdes (hozer@drgw.net)
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#include <linux/config.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/a.out.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/initrd.h>
+#include <linux/ioport.h>
+#include <linux/console.h>
+#include <linux/timex.h>
+#include <linux/pci.h>
+#include <linux/ide.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+
+#include <asm/sections.h>
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/residual.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/cache.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/mc146818rtc.h>
+#include <asm/mk48t59.h>
+#include <asm/prep_nvram.h>
+#include <asm/raven.h>
+#include <asm/vga.h>
+#include <asm/time.h>
+#include <asm/mpc10x.h>
+#include <asm/i8259.h>
+#include <asm/open_pic.h>
+#include <asm/pci-bridge.h>
+#include <asm/todc.h>
+
+TODC_ALLOC();
+
+unsigned char ucSystemType;
+unsigned char ucBoardRev;
+unsigned char ucBoardRevMaj, ucBoardRevMin;
+
+extern unsigned char prep_nvram_read_val(int addr);
+extern void prep_nvram_write_val(int addr,
+ unsigned char val);
+extern unsigned char rs_nvram_read_val(int addr);
+extern void rs_nvram_write_val(int addr,
+ unsigned char val);
+extern void ibm_prep_init(void);
+
+extern void prep_find_bridges(void);
+
+int _prep_type;
+
+extern void prep_residual_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
+extern void prep_sandalfoot_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
+extern void prep_thinkpad_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
+extern void prep_carolina_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
+extern void prep_tiger1_setup_pci(char *irq_edge_mask_lo, char *irq_edge_mask_hi);
+
+
+#define cached_21 (((char *)(ppc_cached_irq_mask))[3])
+#define cached_A1 (((char *)(ppc_cached_irq_mask))[2])
+
+/* for the mac fs */
+dev_t boot_dev;
+
+#ifdef CONFIG_SOUND_CS4232
+long ppc_cs4232_dma, ppc_cs4232_dma2;
+#endif
+
+extern PTE *Hash, *Hash_end;
+extern unsigned long Hash_size, Hash_mask;
+extern int probingmem;
+extern unsigned long loops_per_jiffy;
+
+#ifdef CONFIG_SOUND_CS4232
+EXPORT_SYMBOL(ppc_cs4232_dma);
+EXPORT_SYMBOL(ppc_cs4232_dma2);
+#endif
+
+/* useful ISA ports */
+#define PREP_SYSCTL 0x81c
+/* present in the IBM reference design; possibly identical in Mot boxes: */
+#define PREP_IBM_SIMM_ID 0x803 /* SIMM size: 32 or 8 MiB */
+#define PREP_IBM_SIMM_PRESENCE 0x804
+#define PREP_IBM_EQUIPMENT 0x80c
+#define PREP_IBM_L2INFO 0x80d
+#define PREP_IBM_PM1 0x82a /* power management register 1 */
+#define PREP_IBM_PLANAR 0x852 /* planar ID - identifies the motherboard */
+#define PREP_IBM_DISP 0x8c0 /* 4-digit LED display */
+
+/* Equipment Present Register masks: */
+#define PREP_IBM_EQUIPMENT_RESERVED 0x80
+#define PREP_IBM_EQUIPMENT_SCSIFUSE 0x40
+#define PREP_IBM_EQUIPMENT_L2_COPYBACK 0x08
+#define PREP_IBM_EQUIPMENT_L2_256 0x04
+#define PREP_IBM_EQUIPMENT_CPU 0x02
+#define PREP_IBM_EQUIPMENT_L2 0x01
+
+/* planar ID values: */
+/* Sandalfoot/Sandalbow (6015/7020) */
+#define PREP_IBM_SANDALFOOT 0xfc
+/* Woodfield, Thinkpad 850/860 (6042/7249) */
+#define PREP_IBM_THINKPAD 0xff /* planar ID unimplemented */
+/* PowerSeries 830/850 (6050/6070) */
+#define PREP_IBM_CAROLINA_IDE_0 0xf0
+#define PREP_IBM_CAROLINA_IDE_1 0xf1
+#define PREP_IBM_CAROLINA_IDE_2 0xf2
+#define PREP_IBM_CAROLINA_IDE_3 0xf3
+/* 7248-43P */
+#define PREP_IBM_CAROLINA_SCSI_0 0xf4
+#define PREP_IBM_CAROLINA_SCSI_1 0xf5
+#define PREP_IBM_CAROLINA_SCSI_2 0xf6
+#define PREP_IBM_CAROLINA_SCSI_3 0xf7 /* missing from Carolina Tech Spec */
+/* Tiger1 (7043-140) */
+#define PREP_IBM_TIGER1_133 0xd1
+#define PREP_IBM_TIGER1_166 0xd2
+#define PREP_IBM_TIGER1_180 0xd3
+#define PREP_IBM_TIGER1_xxx 0xd4 /* unknown, but probably exists */
+#define PREP_IBM_TIGER1_333 0xd5 /* missing from Tiger Tech Spec */
+
+/* setup_ibm_pci:
+ * set Motherboard_map_name, Motherboard_map, Motherboard_routes.
+ * return 8259 edge/level masks.
+ */
+void (*setup_ibm_pci)(char *irq_lo, char *irq_hi);
+
+extern char *Motherboard_map_name; /* for use in *_cpuinfo */
+
+/*
+ * As found in the PReP reference implementation.
+ * Used by Thinkpad, Sandalfoot (6015/7020), and all Motorola PReP.
+ */
+static void __init
+prep_gen_enable_l2(void)
+{
+ outb(inb(PREP_SYSCTL) | 0x3, PREP_SYSCTL);
+}
+
+/* Used by Carolina and Tiger1 */
+static void __init
+prep_carolina_enable_l2(void)
+{
+ outb(inb(PREP_SYSCTL) | 0xc0, PREP_SYSCTL);
+}
+
+/* cpuinfo code common to all IBM PReP */
+static void __prep
+prep_ibm_cpuinfo(struct seq_file *m)
+{
+ unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
+
+ seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
+
+ seq_printf(m, "upgrade cpu\t: ");
+ if (equip_reg & PREP_IBM_EQUIPMENT_CPU) {
+ seq_printf(m, "not ");
+ }
+ seq_printf(m, "present\n");
+
+ /* print info about the SCSI fuse */
+ seq_printf(m, "scsi fuse\t: ");
+ if (equip_reg & PREP_IBM_EQUIPMENT_SCSIFUSE)
+ seq_printf(m, "ok");
+ else
+ seq_printf(m, "bad");
+ seq_printf(m, "\n");
+
+ /* print info about SIMMs */
+ if (have_residual_data) {
+ int i;
+ seq_printf(m, "simms\t\t: ");
+ for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
+ if (res->Memories[i].SIMMSize != 0)
+ seq_printf(m, "%d:%ldMiB ", i,
+ (res->Memories[i].SIMMSize > 1024) ?
+ res->Memories[i].SIMMSize>>20 :
+ res->Memories[i].SIMMSize);
+ }
+ seq_printf(m, "\n");
+ }
+}
+
+static int __prep
+prep_gen_cpuinfo(struct seq_file *m)
+{
+ prep_ibm_cpuinfo(m);
+ return 0;
+}
+
+static int __prep
+prep_sandalfoot_cpuinfo(struct seq_file *m)
+{
+ unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
+
+ prep_ibm_cpuinfo(m);
+
+ /* report amount and type of L2 cache present */
+ seq_printf(m, "L2 cache\t: ");
+ if (equip_reg & PREP_IBM_EQUIPMENT_L2) {
+ seq_printf(m, "not present");
+ } else {
+ if (equip_reg & PREP_IBM_EQUIPMENT_L2_256)
+ seq_printf(m, "256KiB");
+ else
+ seq_printf(m, "unknown size");
+
+ if (equip_reg & PREP_IBM_EQUIPMENT_L2_COPYBACK)
+ seq_printf(m, ", copy-back");
+ else
+ seq_printf(m, ", write-through");
+ }
+ seq_printf(m, "\n");
+
+ return 0;
+}
+
+static int __prep
+prep_thinkpad_cpuinfo(struct seq_file *m)
+{
+ unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
+ char *cpubus_speed, *pci_speed;
+
+ prep_ibm_cpuinfo(m);
+
+ /* report amount and type of L2 cache present */
+ seq_printf(m, "l2 cache\t: ");
+ if ((equip_reg & 0x1) == 0) {
+ switch ((equip_reg & 0xc) >> 2) {
+ case 0x0:
+ seq_printf(m, "128KiB look-aside 2-way write-through\n");
+ break;
+ case 0x1:
+ seq_printf(m, "512KiB look-aside direct-mapped write-back\n");
+ break;
+ case 0x2:
+ seq_printf(m, "256KiB look-aside 2-way write-through\n");
+ break;
+ case 0x3:
+ seq_printf(m, "256KiB look-aside direct-mapped write-back\n");
+ break;
+ }
+ } else {
+ seq_printf(m, "not present\n");
+ }
+
+ /* report bus speeds because we can */
+ if ((equip_reg & 0x80) == 0) {
+ switch ((equip_reg & 0x30) >> 4) {
+ case 0x1:
+ cpubus_speed = "50";
+ pci_speed = "25";
+ break;
+ case 0x3:
+ cpubus_speed = "66";
+ pci_speed = "33";
+ break;
+ default:
+ cpubus_speed = "unknown";
+ pci_speed = "unknown";
+ break;
+ }
+ } else {
+ switch ((equip_reg & 0x30) >> 4) {
+ case 0x1:
+ cpubus_speed = "25";
+ pci_speed = "25";
+ break;
+ case 0x2:
+ cpubus_speed = "60";
+ pci_speed = "30";
+ break;
+ case 0x3:
+ cpubus_speed = "33";
+ pci_speed = "33";
+ break;
+ default:
+ cpubus_speed = "unknown";
+ pci_speed = "unknown";
+ break;
+ }
+ }
+ seq_printf(m, "60x bus\t\t: %sMHz\n", cpubus_speed);
+ seq_printf(m, "pci bus\t\t: %sMHz\n", pci_speed);
+
+ return 0;
+}
+
+static int __prep
+prep_carolina_cpuinfo(struct seq_file *m)
+{
+ unsigned int equip_reg = inb(PREP_IBM_EQUIPMENT);
+
+ prep_ibm_cpuinfo(m);
+
+ /* report amount and type of L2 cache present */
+ seq_printf(m, "l2 cache\t: ");
+ if ((equip_reg & 0x1) == 0) {
+ unsigned int l2_reg = inb(PREP_IBM_L2INFO);
+
+ /* L2 size */
+ if ((l2_reg & 0x60) == 0)
+ seq_printf(m, "256KiB");
+ else if ((l2_reg & 0x60) == 0x20)
+ seq_printf(m, "512KiB");
+ else
+ seq_printf(m, "unknown size");
+
+ /* L2 type */
+ if ((l2_reg & 0x3) == 0)
+ seq_printf(m, ", async");
+ else if ((l2_reg & 0x3) == 1)
+ seq_printf(m, ", sync");
+ else
+ seq_printf(m, ", unknown type");
+
+ seq_printf(m, "\n");
+ } else {
+ seq_printf(m, "not present\n");
+ }
+
+ return 0;
+}
+
+static int __prep
+prep_tiger1_cpuinfo(struct seq_file *m)
+{
+ unsigned int l2_reg = inb(PREP_IBM_L2INFO);
+
+ prep_ibm_cpuinfo(m);
+
+ /* report amount and type of L2 cache present */
+ seq_printf(m, "l2 cache\t: ");
+ if ((l2_reg & 0xf) == 0xf) {
+ seq_printf(m, "not present\n");
+ } else {
+ if (l2_reg & 0x8)
+ seq_printf(m, "async, ");
+ else
+ seq_printf(m, "sync burst, ");
+
+ if (l2_reg & 0x4)
+ seq_printf(m, "parity, ");
+ else
+ seq_printf(m, "no parity, ");
+
+ switch (l2_reg & 0x3) {
+ case 0x0:
+ seq_printf(m, "256KiB\n");
+ break;
+ case 0x1:
+ seq_printf(m, "512KiB\n");
+ break;
+ case 0x2:
+ seq_printf(m, "1MiB\n");
+ break;
+ default:
+ seq_printf(m, "unknown size\n");
+ break;
+ }
+ }
+
+ return 0;
+}
+
+
+/* Used by all Motorola PReP */
+static int __prep
+prep_mot_cpuinfo(struct seq_file *m)
+{
+ unsigned int cachew = *((unsigned char *)CACHECRBA);
+
+ seq_printf(m, "machine\t\t: PReP %s\n", Motherboard_map_name);
+
+ /* report amount and type of L2 cache present */
+ seq_printf(m, "l2 cache\t: ");
+ switch (cachew & L2CACHE_MASK) {
+ case L2CACHE_512KB:
+ seq_printf(m, "512KiB");
+ break;
+ case L2CACHE_256KB:
+ seq_printf(m, "256KiB");
+ break;
+ case L2CACHE_1MB:
+ seq_printf(m, "1MiB");
+ break;
+ case L2CACHE_NONE:
+ seq_printf(m, "none\n");
+ goto no_l2;
+ break;
+ default:
+ seq_printf(m, "%x\n", cachew);
+ }
+
+ seq_printf(m, ", parity %s",
+ (cachew & L2CACHE_PARITY)? "enabled" : "disabled");
+
+ seq_printf(m, " SRAM:");
+
+ switch ( ((cachew & 0xf0) >> 4) & ~(0x3) ) {
+ case 1: seq_printf(m, "synchronous, parity, flow-through\n");
+ break;
+ case 2: seq_printf(m, "asynchronous, no parity\n");
+ break;
+ case 3: seq_printf(m, "asynchronous, parity\n");
+ break;
+ default:seq_printf(m, "synchronous, pipelined, no parity\n");
+ break;
+ }
+
+no_l2:
+ /* print info about SIMMs */
+ if (have_residual_data) {
+ int i;
+ seq_printf(m, "simms\t\t: ");
+ for (i = 0; (res->ActualNumMemories) && (i < MAX_MEMS); i++) {
+ if (res->Memories[i].SIMMSize != 0)
+ seq_printf(m, "%d:%ldM ", i,
+ (res->Memories[i].SIMMSize > 1024) ?
+ res->Memories[i].SIMMSize>>20 :
+ res->Memories[i].SIMMSize);
+ }
+ seq_printf(m, "\n");
+ }
+
+ return 0;
+}
+
+static void __prep
+prep_restart(char *cmd)
+{
+#define PREP_SP92 0x92 /* Special Port 92 */
+ local_irq_disable(); /* no interrupts */
+
+ /* set exception prefix high - to the prom */
+ _nmask_and_or_msr(0, MSR_IP);
+
+ /* make sure bit 0 (reset) is a 0 */
+ outb( inb(PREP_SP92) & ~1L , PREP_SP92);
+ /* signal a reset to system control port A - soft reset */
+ outb( inb(PREP_SP92) | 1 , PREP_SP92);
+
+ while ( 1 ) ;
+ /* not reached */
+#undef PREP_SP92
+}
+
+static void __prep
+prep_halt(void)
+{
+ local_irq_disable(); /* no interrupts */
+
+ /* set exception prefix high - to the prom */
+ _nmask_and_or_msr(0, MSR_IP);
+
+ while ( 1 ) ;
+ /* not reached */
+}
+
+/* Carrera is the power manager in the Thinkpads. Unfortunately not much is
+ * known about it, so we can't power down.
+ */
+static void __prep
+prep_carrera_poweroff(void)
+{
+ prep_halt();
+}
+
+/*
+ * On most IBM PReP's, power management is handled by a Signetics 87c750
+ * behind the Utah component on the ISA bus. To access the 750 you must write
+ * a series of nibbles to port 0x82a (decoded by the Utah). This is described
+ * somewhat in the IBM Carolina Technical Specification.
+ * -Hollis
+ */
+static void __prep
+utah_sig87c750_setbit(unsigned int bytenum, unsigned int bitnum, int value)
+{
+ /*
+ * byte1: 0 0 0 1 0 d a5 a4
+ * byte2: 0 0 0 1 a3 a2 a1 a0
+ *
+ * d = the bit's value, enabled or disabled
+ * (a5 a4 a3) = the byte number, minus 20
+ * (a2 a1 a0) = the bit number
+ *
+ * example: set the 5th bit of byte 21 (21.5)
+ * a5 a4 a3 = 001 (byte 1)
+ * a2 a1 a0 = 101 (bit 5)
+ *
+ * byte1 = 0001 0100 (0x14)
+ * byte2 = 0001 1101 (0x1d)
+ */
+ unsigned char byte1=0x10, byte2=0x10;
+
+ /* the 750's '20.0' is accessed as '0.0' through Utah (which adds 20) */
+ bytenum -= 20;
+
+ byte1 |= (!!value) << 2; /* set d */
+ byte1 |= (bytenum >> 1) & 0x3; /* set a5, a4 */
+
+ byte2 |= (bytenum & 0x1) << 3; /* set a3 */
+ byte2 |= bitnum & 0x7; /* set a2, a1, a0 */
+
+ outb(byte1, PREP_IBM_PM1); /* first nibble */
+ mb();
+ udelay(100); /* important: let controller recover */
+
+ outb(byte2, PREP_IBM_PM1); /* second nibble */
+ mb();
+ udelay(100); /* important: let controller recover */
+}
+
+static void __prep
+prep_sig750_poweroff(void)
+{
+ /* tweak the power manager found in most IBM PRePs (except Thinkpads) */
+
+ local_irq_disable();
+ /* set exception prefix high - to the prom */
+ _nmask_and_or_msr(0, MSR_IP);
+
+ utah_sig87c750_setbit(21, 5, 1); /* set bit 21.5, "PMEXEC_OFF" */
+
+ while (1) ;
+ /* not reached */
+}
+
+static int __prep
+prep_show_percpuinfo(struct seq_file *m, int i)
+{
+ /* PREP's without residual data will give incorrect values here */
+ seq_printf(m, "clock\t\t: ");
+ if (have_residual_data)
+ seq_printf(m, "%ldMHz\n",
+ (res->VitalProductData.ProcessorHz > 1024) ?
+ res->VitalProductData.ProcessorHz / 1000000 :
+ res->VitalProductData.ProcessorHz);
+ else
+ seq_printf(m, "???\n");
+
+ return 0;
+}
+
+#ifdef CONFIG_SOUND_CS4232
+static long __init masktoint(unsigned int i)
+{
+ int t = -1;
+ while (i >> ++t)
+ ;
+ return (t-1);
+}
+
+/*
+ * ppc_cs4232_dma and ppc_cs4232_dma2 are used in include/asm/dma.h
+ * to distinguish sound dma-channels from others. This is because
+ * blocksize on 16 bit dma-channels 5,6,7 is 128k, but
+ * the cs4232.c uses 64k like on 8 bit dma-channels 0,1,2,3
+ */
+
+static void __init prep_init_sound(void)
+{
+ PPC_DEVICE *audiodevice = NULL;
+
+ /*
+ * Get the needed resource informations from residual data.
+ *
+ */
+ if (have_residual_data)
+ audiodevice = residual_find_device(~0, NULL,
+ MultimediaController, AudioController, -1, 0);
+
+ if (audiodevice != NULL) {
+ PnP_TAG_PACKET *pkt;
+
+ pkt = PnP_find_packet((unsigned char *)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
+ S5_Packet, 0);
+ if (pkt != NULL)
+ ppc_cs4232_dma = masktoint(pkt->S5_Pack.DMAMask);
+ pkt = PnP_find_packet((unsigned char*)&res->DevicePnPHeap[audiodevice->AllocatedOffset],
+ S5_Packet, 1);
+ if (pkt != NULL)
+ ppc_cs4232_dma2 = masktoint(pkt->S5_Pack.DMAMask);
+ }
+
+ /*
+ * These are the PReP specs' defaults for the cs4231. We use these
+ * as fallback incase we don't have residual data.
+ * At least the IBM Thinkpad 850 with IDE DMA Channels at 6 and 7
+ * will use the other values.
+ */
+ if (audiodevice == NULL) {
+ switch (_prep_type) {
+ case _PREP_IBM:
+ ppc_cs4232_dma = 1;
+ ppc_cs4232_dma2 = -1;
+ break;
+ default:
+ ppc_cs4232_dma = 6;
+ ppc_cs4232_dma2 = 7;
+ }
+ }
+
+ /*
+ * Find a way to push these informations to the cs4232 driver
+ * Give it out with printk, when not in cmd_line?
+ * Append it to cmd_line and saved_command_line?
+ * Format is cs4232=io,irq,dma,dma2
+ */
+}
+#endif /* CONFIG_SOUND_CS4232 */
+
+/*
+ * Fill out screen_info according to the residual data. This allows us to use
+ * at least vesafb.
+ */
+static void __init
+prep_init_vesa(void)
+{
+#if (defined(CONFIG_FB_VGA16) || defined(CONFIG_FB_VGA16_MODULE) || \
+ defined(CONFIG_FB_VESA))
+ PPC_DEVICE *vgadev = NULL;
+
+ if (have_residual_data)
+ vgadev = residual_find_device(~0, NULL, DisplayController,
+ SVGAController, -1, 0);
+
+ if (vgadev != NULL) {
+ PnP_TAG_PACKET *pkt;
+
+ pkt = PnP_find_large_vendor_packet(
+ (unsigned char *)&res->DevicePnPHeap[vgadev->AllocatedOffset],
+ 0x04, 0); /* 0x04 = Display Tag */
+ if (pkt != NULL) {
+ unsigned char *ptr = (unsigned char *)pkt;
+
+ if (ptr[4]) {
+ /* graphics mode */
+ screen_info.orig_video_isVGA = VIDEO_TYPE_VLFB;
+
+ screen_info.lfb_depth = ptr[4] * 8;
+
+ screen_info.lfb_width = swab16(*(short *)(ptr+6));
+ screen_info.lfb_height = swab16(*(short *)(ptr+8));
+ screen_info.lfb_linelength = swab16(*(short *)(ptr+10));
+
+ screen_info.lfb_base = swab32(*(long *)(ptr+12));
+ screen_info.lfb_size = swab32(*(long *)(ptr+20)) / 65536;
+ }
+ }
+ }
+#endif
+}
+
+/*
+ * Set DBAT 2 to access 0x80000000 so early progress messages will work
+ */
+static __inline__ void
+prep_set_bat(void)
+{
+ /* wait for all outstanding memory access to complete */
+ mb();
+
+ /* setup DBATs */
+ mtspr(SPRN_DBAT2U, 0x80001ffe);
+ mtspr(SPRN_DBAT2L, 0x8000002a);
+
+ /* wait for updates */
+ mb();
+}
+
+/*
+ * IBM 3-digit status LED
+ */
+static unsigned int ibm_statusled_base __prepdata;
+
+static void __prep
+ibm_statusled_progress(char *s, unsigned short hex);
+
+static int __prep
+ibm_statusled_panic(struct notifier_block *dummy1, unsigned long dummy2,
+ void * dummy3)
+{
+ ibm_statusled_progress(NULL, 0x505); /* SOS */
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block ibm_statusled_block __prepdata = {
+ ibm_statusled_panic,
+ NULL,
+ INT_MAX /* try to do it first */
+};
+
+static void __prep
+ibm_statusled_progress(char *s, unsigned short hex)
+{
+ static int notifier_installed;
+ /*
+ * Progress uses 4 digits and we have only 3. So, we map 0xffff to
+ * 0xfff for display switch off. Out of range values are mapped to
+ * 0xeff, as I'm told 0xf00 and above are reserved for hardware codes.
+ * Install the panic notifier when the display is first switched off.
+ */
+ if (hex == 0xffff) {
+ hex = 0xfff;
+ if (!notifier_installed) {
+ ++notifier_installed;
+ notifier_chain_register(&panic_notifier_list,
+ &ibm_statusled_block);
+ }
+ }
+ else
+ if (hex > 0xfff)
+ hex = 0xeff;
+
+ mb();
+ outw(hex, ibm_statusled_base);
+}
+
+static void __init
+ibm_statusled_init(void)
+{
+ /*
+ * The IBM 3-digit LED display is specified in the residual data
+ * as an operator panel device, type "System Status LED". Find
+ * that device and determine its address. We validate all the
+ * other parameters on the off-chance another, similar device
+ * exists.
+ */
+ if (have_residual_data) {
+ PPC_DEVICE *led;
+ PnP_TAG_PACKET *pkt;
+
+ led = residual_find_device(~0, NULL, SystemPeripheral,
+ OperatorPanel, SystemStatusLED, 0);
+ if (!led)
+ return;
+
+ pkt = PnP_find_packet((unsigned char *)
+ &res->DevicePnPHeap[led->AllocatedOffset], S8_Packet, 0);
+ if (!pkt)
+ return;
+
+ if (pkt->S8_Pack.IOInfo != ISAAddr16bit)
+ return;
+ if (*(unsigned short *)pkt->S8_Pack.RangeMin !=
+ *(unsigned short *)pkt->S8_Pack.RangeMax)
+ return;
+ if (pkt->S8_Pack.IOAlign != 2)
+ return;
+ if (pkt->S8_Pack.IONum != 2)
+ return;
+
+ ibm_statusled_base = ld_le16((unsigned short *)
+ (pkt->S8_Pack.RangeMin));
+ ppc_md.progress = ibm_statusled_progress;
+ }
+}
+
+static void __init
+prep_setup_arch(void)
+{
+ unsigned char reg;
+ int is_ide=0;
+
+ /* init to some ~sane value until calibrate_delay() runs */
+ loops_per_jiffy = 50000000;
+
+ /* Lookup PCI host bridges */
+ prep_find_bridges();
+
+ /* Set up floppy in PS/2 mode */
+ outb(0x09, SIO_CONFIG_RA);
+ reg = inb(SIO_CONFIG_RD);
+ reg = (reg & 0x3F) | 0x40;
+ outb(reg, SIO_CONFIG_RD);
+ outb(reg, SIO_CONFIG_RD); /* Have to write twice to change! */
+
+ switch ( _prep_type )
+ {
+ case _PREP_IBM:
+ reg = inb(PREP_IBM_PLANAR);
+ printk(KERN_INFO "IBM planar ID: %02x", reg);
+ switch (reg) {
+ case PREP_IBM_SANDALFOOT:
+ prep_gen_enable_l2();
+ setup_ibm_pci = prep_sandalfoot_setup_pci;
+ ppc_md.power_off = prep_sig750_poweroff;
+ ppc_md.show_cpuinfo = prep_sandalfoot_cpuinfo;
+ break;
+ case PREP_IBM_THINKPAD:
+ prep_gen_enable_l2();
+ setup_ibm_pci = prep_thinkpad_setup_pci;
+ ppc_md.power_off = prep_carrera_poweroff;
+ ppc_md.show_cpuinfo = prep_thinkpad_cpuinfo;
+ break;
+ default:
+ if (have_residual_data) {
+ prep_gen_enable_l2();
+ setup_ibm_pci = prep_residual_setup_pci;
+ ppc_md.power_off = prep_halt;
+ ppc_md.show_cpuinfo = prep_gen_cpuinfo;
+ break;
+ }
+ else
+ printk(" - unknown! Assuming Carolina");
+ /* fall through */
+ case PREP_IBM_CAROLINA_IDE_0:
+ case PREP_IBM_CAROLINA_IDE_1:
+ case PREP_IBM_CAROLINA_IDE_2:
+ case PREP_IBM_CAROLINA_IDE_3:
+ is_ide = 1;
+ case PREP_IBM_CAROLINA_SCSI_0:
+ case PREP_IBM_CAROLINA_SCSI_1:
+ case PREP_IBM_CAROLINA_SCSI_2:
+ case PREP_IBM_CAROLINA_SCSI_3:
+ prep_carolina_enable_l2();
+ setup_ibm_pci = prep_carolina_setup_pci;
+ ppc_md.power_off = prep_sig750_poweroff;
+ ppc_md.show_cpuinfo = prep_carolina_cpuinfo;
+ break;
+ case PREP_IBM_TIGER1_133:
+ case PREP_IBM_TIGER1_166:
+ case PREP_IBM_TIGER1_180:
+ case PREP_IBM_TIGER1_xxx:
+ case PREP_IBM_TIGER1_333:
+ prep_carolina_enable_l2();
+ setup_ibm_pci = prep_tiger1_setup_pci;
+ ppc_md.power_off = prep_sig750_poweroff;
+ ppc_md.show_cpuinfo = prep_tiger1_cpuinfo;
+ break;
+ }
+ printk("\n");
+
+ /* default root device */
+ if (is_ide)
+ ROOT_DEV = MKDEV(IDE0_MAJOR, 3);
+ else
+ ROOT_DEV = MKDEV(SCSI_DISK0_MAJOR, 3);
+
+ break;
+ case _PREP_Motorola:
+ prep_gen_enable_l2();
+ ppc_md.power_off = prep_halt;
+ ppc_md.show_cpuinfo = prep_mot_cpuinfo;
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (initrd_start)
+ ROOT_DEV = Root_RAM0;
+ else
+#endif
+#ifdef CONFIG_ROOT_NFS
+ ROOT_DEV = Root_NFS;
+#else
+ ROOT_DEV = Root_SDA2;
+#endif
+ break;
+ }
+
+ /* Read in NVRAM data */
+ init_prep_nvram();
+
+ /* if no bootargs, look in NVRAM */
+ if ( cmd_line[0] == '\0' ) {
+ char *bootargs;
+ bootargs = prep_nvram_get_var("bootargs");
+ if (bootargs != NULL) {
+ strcpy(cmd_line, bootargs);
+ /* again.. */
+ strcpy(saved_command_line, cmd_line);
+ }
+ }
+
+#ifdef CONFIG_SOUND_CS4232
+ prep_init_sound();
+#endif /* CONFIG_SOUND_CS4232 */
+
+ prep_init_vesa();
+
+ switch (_prep_type) {
+ case _PREP_Motorola:
+ raven_init();
+ break;
+ case _PREP_IBM:
+ ibm_prep_init();
+ break;
+ }
+
+#ifdef CONFIG_VGA_CONSOLE
+ /* vgacon.c needs to know where we mapped IO memory in io_block_mapping() */
+ vgacon_remap_base = 0xf0000000;
+ conswitchp = &vga_con;
+#endif
+}
+
+/*
+ * First, see if we can get this information from the residual data.
+ * This is important on some IBM PReP systems. If we cannot, we let the
+ * TODC code handle doing this.
+ */
+static void __init
+prep_calibrate_decr(void)
+{
+ if (have_residual_data) {
+ unsigned long freq, divisor = 4;
+
+ if ( res->VitalProductData.ProcessorBusHz ) {
+ freq = res->VitalProductData.ProcessorBusHz;
+ printk("time_init: decrementer frequency = %lu.%.6lu MHz\n",
+ (freq/divisor)/1000000,
+ (freq/divisor)%1000000);
+ tb_to_us = mulhwu_scale_factor(freq/divisor, 1000000);
+ tb_ticks_per_jiffy = freq / HZ / divisor;
+ }
+ }
+ else
+ todc_calibrate_decr();
+}
+
+static unsigned int __prep
+prep_irq_canonicalize(u_int irq)
+{
+ if (irq == 2)
+ {
+ return 9;
+ }
+ else
+ {
+ return irq;
+ }
+}
+
+static void __init
+prep_init_IRQ(void)
+{
+ int i;
+ unsigned int pci_viddid, pci_did;
+
+ if (OpenPIC_Addr != NULL) {
+ openpic_init(NUM_8259_INTERRUPTS);
+ /* We have a cascade on OpenPIC IRQ 0, Linux IRQ 16 */
+ openpic_hookup_cascade(NUM_8259_INTERRUPTS, "82c59 cascade",
+ i8259_irq);
+ }
+ for ( i = 0 ; i < NUM_8259_INTERRUPTS ; i++ )
+ irq_desc[i].handler = &i8259_pic;
+
+ if (have_residual_data) {
+ i8259_init(residual_isapic_addr());
+ return;
+ }
+
+ /* If we have a Raven PCI bridge or a Hawk PCI bridge / Memory
+ * controller, we poll (as they have a different int-ack address). */
+ early_read_config_dword(NULL, 0, 0, PCI_VENDOR_ID, &pci_viddid);
+ pci_did = (pci_viddid & 0xffff0000) >> 16;
+ if (((pci_viddid & 0xffff) == PCI_VENDOR_ID_MOTOROLA)
+ && ((pci_did == PCI_DEVICE_ID_MOTOROLA_RAVEN)
+ || (pci_did == PCI_DEVICE_ID_MOTOROLA_HAWK)))
+ i8259_init(0);
+ else
+ /* PCI interrupt ack address given in section 6.1.8 of the
+ * PReP specification. */
+ i8259_init(MPC10X_MAPA_PCI_INTACK_ADDR);
+}
+
+#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
+/*
+ * IDE stuff.
+ */
+static int __prep
+prep_ide_default_irq(unsigned long base)
+{
+ switch (base) {
+ case 0x1f0: return 13;
+ case 0x170: return 13;
+ case 0x1e8: return 11;
+ case 0x168: return 10;
+ case 0xfff0: return 14; /* MCP(N)750 ide0 */
+ case 0xffe0: return 15; /* MCP(N)750 ide1 */
+ default: return 0;
+ }
+}
+
+static unsigned long __prep
+prep_ide_default_io_base(int index)
+{
+ switch (index) {
+ case 0: return 0x1f0;
+ case 1: return 0x170;
+ case 2: return 0x1e8;
+ case 3: return 0x168;
+ default:
+ return 0;
+ }
+}
+#endif
+
+#ifdef CONFIG_SMP
+/* PReP (MTX) support */
+static int __init
+smp_prep_probe(void)
+{
+ extern int mot_multi;
+
+ if (mot_multi) {
+ openpic_request_IPIs();
+ smp_hw_index[1] = 1;
+ return 2;
+ }
+
+ return 1;
+}
+
+static void __init
+smp_prep_kick_cpu(int nr)
+{
+ *(unsigned long *)KERNELBASE = nr;
+ asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
+ printk("CPU1 released, waiting\n");
+}
+
+static void __init
+smp_prep_setup_cpu(int cpu_nr)
+{
+ if (OpenPIC_Addr)
+ do_openpic_setup_cpu();
+}
+
+static struct smp_ops_t prep_smp_ops __prepdata = {
+ smp_openpic_message_pass,
+ smp_prep_probe,
+ smp_prep_kick_cpu,
+ smp_prep_setup_cpu,
+ .give_timebase = smp_generic_give_timebase,
+ .take_timebase = smp_generic_take_timebase,
+};
+#endif /* CONFIG_SMP */
+
+/*
+ * Setup the bat mappings we're going to load that cover
+ * the io areas. RAM was mapped by mapin_ram().
+ * -- Cort
+ */
+static void __init
+prep_map_io(void)
+{
+ io_block_mapping(0x80000000, PREP_ISA_IO_BASE, 0x10000000, _PAGE_IO);
+ io_block_mapping(0xf0000000, PREP_ISA_MEM_BASE, 0x08000000, _PAGE_IO);
+}
+
+static int __init
+prep_request_io(void)
+{
+ if (_machine == _MACH_prep) {
+#ifdef CONFIG_NVRAM
+ request_region(PREP_NVRAM_AS0, 0x8, "nvram");
+#endif
+ request_region(0x00,0x20,"dma1");
+ request_region(0x40,0x20,"timer");
+ request_region(0x80,0x10,"dma page reg");
+ request_region(0xc0,0x20,"dma2");
+ }
+
+ return 0;
+}
+
+device_initcall(prep_request_io);
+
+void __init
+prep_init(unsigned long r3, unsigned long r4, unsigned long r5,
+ unsigned long r6, unsigned long r7)
+{
+#ifdef CONFIG_PREP_RESIDUAL
+ /* make a copy of residual data */
+ if ( r3 ) {
+ memcpy((void *)res,(void *)(r3+KERNELBASE),
+ sizeof(RESIDUAL));
+ }
+#endif
+
+ isa_io_base = PREP_ISA_IO_BASE;
+ isa_mem_base = PREP_ISA_MEM_BASE;
+ pci_dram_offset = PREP_PCI_DRAM_OFFSET;
+ ISA_DMA_THRESHOLD = 0x00ffffff;
+ DMA_MODE_READ = 0x44;
+ DMA_MODE_WRITE = 0x48;
+
+ /* figure out what kind of prep workstation we are */
+ if (have_residual_data) {
+ if ( !strncmp(res->VitalProductData.PrintableModel,"IBM",3) )
+ _prep_type = _PREP_IBM;
+ else
+ _prep_type = _PREP_Motorola;
+ }
+ else {
+ /* assume motorola if no residual (netboot?) */
+ _prep_type = _PREP_Motorola;
+ }
+
+#ifdef CONFIG_PREP_RESIDUAL
+ /* Switch off all residual data processing if the user requests it */
+ if (strstr(cmd_line, "noresidual") != NULL)
+ res = NULL;
+#endif
+
+ /* Initialise progress early to get maximum benefit */
+ prep_set_bat();
+ ibm_statusled_init();
+
+ ppc_md.setup_arch = prep_setup_arch;
+ ppc_md.show_percpuinfo = prep_show_percpuinfo;
+ ppc_md.show_cpuinfo = NULL; /* set in prep_setup_arch() */
+ ppc_md.irq_canonicalize = prep_irq_canonicalize;
+ ppc_md.init_IRQ = prep_init_IRQ;
+ /* this gets changed later on if we have an OpenPIC -- Cort */
+ ppc_md.get_irq = i8259_irq;
+
+ ppc_md.phys_mem_access_prot = pci_phys_mem_access_prot;
+
+ ppc_md.restart = prep_restart;
+ ppc_md.power_off = NULL; /* set in prep_setup_arch() */
+ ppc_md.halt = prep_halt;
+
+ ppc_md.nvram_read_val = prep_nvram_read_val;
+ ppc_md.nvram_write_val = prep_nvram_write_val;
+
+ ppc_md.time_init = todc_time_init;
+ if (_prep_type == _PREP_IBM) {
+ ppc_md.rtc_read_val = todc_mc146818_read_val;
+ ppc_md.rtc_write_val = todc_mc146818_write_val;
+ TODC_INIT(TODC_TYPE_MC146818, RTC_PORT(0), NULL, RTC_PORT(1),
+ 8);
+ } else {
+ TODC_INIT(TODC_TYPE_MK48T59, PREP_NVRAM_AS0, PREP_NVRAM_AS1,
+ PREP_NVRAM_DATA, 8);
+ }
+
+ ppc_md.calibrate_decr = prep_calibrate_decr;
+ ppc_md.set_rtc_time = todc_set_rtc_time;
+ ppc_md.get_rtc_time = todc_get_rtc_time;
+
+ ppc_md.setup_io_mappings = prep_map_io;
+
+#if defined(CONFIG_BLK_DEV_IDE) || defined(CONFIG_BLK_DEV_IDE_MODULE)
+ ppc_ide_md.default_irq = prep_ide_default_irq;
+ ppc_ide_md.default_io_base = prep_ide_default_io_base;
+#endif
+
+#ifdef CONFIG_SMP
+ ppc_md.smp_ops = &prep_smp_ops;
+#endif /* CONFIG_SMP */
+}