Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

10 files changed, 1591 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/chrp/Kconfig b/arch/powerpc/platforms/chrp/Kconfig
new file mode 100644
index 000000000..ead99eff8
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/Kconfig
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0
+config PPC_CHRP
+	bool "Common Hardware Reference Platform (CHRP) based machines"
+	depends on 6xx
+	select HAVE_PCSPKR_PLATFORM
+	select MPIC
+	select PPC_I8259
+	select PPC_INDIRECT_PCI
+	select PPC_RTAS
+	select PPC_RTAS_DAEMON
+	select RTAS_ERROR_LOGGING
+	select PPC_MPC106
+	select PPC_UDBG_16550
+	select PPC_NATIVE
+	select PCI
+	default y
diff --git a/arch/powerpc/platforms/chrp/Makefile b/arch/powerpc/platforms/chrp/Makefile
new file mode 100644
index 000000000..4b3bfadc7
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/Makefile
@@ -0,0 +1,3 @@
+obj-y				+= setup.o time.o pegasos_eth.o pci.o
+obj-$(CONFIG_SMP)		+= smp.o
+obj-$(CONFIG_NVRAM)		+= nvram.o
diff --git a/arch/powerpc/platforms/chrp/chrp.h b/arch/powerpc/platforms/chrp/chrp.h
new file mode 100644
index 000000000..a5a7c338c
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/chrp.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Declarations of CHRP platform-specific things.
+ */
+
+extern void chrp_nvram_init(void);
+extern void chrp_get_rtc_time(struct rtc_time *);
+extern int chrp_set_rtc_time(struct rtc_time *);
+extern long chrp_time_init(void);
+
+extern void chrp_find_bridges(void);
+extern void chrp_event_scan(unsigned long);
diff --git a/arch/powerpc/platforms/chrp/gg2.h b/arch/powerpc/platforms/chrp/gg2.h
new file mode 100644
index 000000000..341ae55b9
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/gg2.h
@@ -0,0 +1,61 @@
+/*
+ *  include/asm-ppc/gg2.h -- VLSI VAS96011/12 `Golden Gate 2' register definitions
+ *
+ *  Copyright (C) 1997 Geert Uytterhoeven
+ *
+ *  This file is based on the following documentation:
+ *
+ *	The VAS96011/12 Chipset, Data Book, Edition 1.0
+ *	VLSI Technology, Inc.
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive
+ *  for more details.
+ */
+
+#ifndef _ASMPPC_GG2_H
+#define _ASMPPC_GG2_H
+
+    /*
+     *  Memory Map (CHRP mode)
+     */
+
+#define GG2_PCI_MEM_BASE	0xc0000000	/* Peripheral memory space */
+#define GG2_ISA_MEM_BASE	0xf7000000	/* Peripheral memory alias */
+#define GG2_ISA_IO_BASE		0xf8000000	/* Peripheral I/O space */
+#define GG2_PCI_CONFIG_BASE	0xfec00000	/* PCI configuration space */
+#define GG2_INT_ACK_SPECIAL	0xfec80000	/* Interrupt acknowledge and */
+						/* special PCI cycles */
+#define GG2_ROM_BASE0		0xff000000	/* ROM bank 0 */
+#define GG2_ROM_BASE1		0xff800000	/* ROM bank 1 */
+
+
+    /*
+     *  GG2 specific PCI Registers
+     */
+
+extern void __iomem *gg2_pci_config_base;	/* kernel virtual address */
+
+#define GG2_PCI_BUSNO		0x40	/* Bus number */
+#define GG2_PCI_SUBBUSNO	0x41	/* Subordinate bus number */
+#define GG2_PCI_DISCCTR		0x42	/* Disconnect counter */
+#define GG2_PCI_PPC_CTRL	0x50	/* PowerPC interface control register */
+#define GG2_PCI_ADDR_MAP	0x5c	/* Address map */
+#define GG2_PCI_PCI_CTRL	0x60	/* PCI interface control register */
+#define GG2_PCI_ROM_CTRL	0x70	/* ROM interface control register */
+#define GG2_PCI_ROM_TIME	0x74	/* ROM timing */
+#define GG2_PCI_CC_CTRL		0x80	/* Cache controller control register */
+#define GG2_PCI_DRAM_BANK0	0x90	/* Control register for DRAM bank #0 */
+#define GG2_PCI_DRAM_BANK1	0x94	/* Control register for DRAM bank #1 */
+#define GG2_PCI_DRAM_BANK2	0x98	/* Control register for DRAM bank #2 */
+#define GG2_PCI_DRAM_BANK3	0x9c	/* Control register for DRAM bank #3 */
+#define GG2_PCI_DRAM_BANK4	0xa0	/* Control register for DRAM bank #4 */
+#define GG2_PCI_DRAM_BANK5	0xa4	/* Control register for DRAM bank #5 */
+#define GG2_PCI_DRAM_TIME0	0xb0	/* Timing parameters set #0 */
+#define GG2_PCI_DRAM_TIME1	0xb4	/* Timing parameters set #1 */
+#define GG2_PCI_DRAM_CTRL	0xc0	/* DRAM control */
+#define GG2_PCI_ERR_CTRL	0xd0	/* Error control register */
+#define GG2_PCI_ERR_STATUS	0xd4	/* Error status register */
+					/* Cleared when read */
+
+#endif /* _ASMPPC_GG2_H */
diff --git a/arch/powerpc/platforms/chrp/nvram.c b/arch/powerpc/platforms/chrp/nvram.c
new file mode 100644
index 000000000..791b86398
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/nvram.c
@@ -0,0 +1,94 @@
+/*
+ *  c 2001 PPC 64 Team, IBM Corp
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ *
+ * /dev/nvram driver for PPC
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spinlock.h>
+#include <linux/uaccess.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/rtas.h>
+#include "chrp.h"
+
+static unsigned int nvram_size;
+static unsigned char nvram_buf[4];
+static DEFINE_SPINLOCK(nvram_lock);
+
+static unsigned char chrp_nvram_read(int addr)
+{
+	unsigned int done;
+	unsigned long flags;
+	unsigned char ret;
+
+	if (addr >= nvram_size) {
+		printk(KERN_DEBUG "%s: read addr %d > nvram_size %u\n",
+		       current->comm, addr, nvram_size);
+		return 0xff;
+	}
+	spin_lock_irqsave(&nvram_lock, flags);
+	if ((rtas_call(rtas_token("nvram-fetch"), 3, 2, &done, addr,
+		       __pa(nvram_buf), 1) != 0) || 1 != done)
+		ret = 0xff;
+	else
+		ret = nvram_buf[0];
+	spin_unlock_irqrestore(&nvram_lock, flags);
+
+	return ret;
+}
+
+static void chrp_nvram_write(int addr, unsigned char val)
+{
+	unsigned int done;
+	unsigned long flags;
+
+	if (addr >= nvram_size) {
+		printk(KERN_DEBUG "%s: write addr %d > nvram_size %u\n",
+		       current->comm, addr, nvram_size);
+		return;
+	}
+	spin_lock_irqsave(&nvram_lock, flags);
+	nvram_buf[0] = val;
+	if ((rtas_call(rtas_token("nvram-store"), 3, 2, &done, addr,
+		       __pa(nvram_buf), 1) != 0) || 1 != done)
+		printk(KERN_DEBUG "rtas IO error storing 0x%02x at %d", val, addr);
+	spin_unlock_irqrestore(&nvram_lock, flags);
+}
+
+void __init chrp_nvram_init(void)
+{
+	struct device_node *nvram;
+	const __be32 *nbytes_p;
+	unsigned int proplen;
+
+	nvram = of_find_node_by_type(NULL, "nvram");
+	if (nvram == NULL)
+		return;
+
+	nbytes_p = of_get_property(nvram, "#bytes", &proplen);
+	if (nbytes_p == NULL || proplen != sizeof(unsigned int)) {
+		of_node_put(nvram);
+		return;
+	}
+
+	nvram_size = be32_to_cpup(nbytes_p);
+
+	printk(KERN_INFO "CHRP nvram contains %u bytes\n", nvram_size);
+	of_node_put(nvram);
+
+	ppc_md.nvram_read_val = chrp_nvram_read;
+	ppc_md.nvram_write_val = chrp_nvram_write;
+
+	return;
+}
+
+MODULE_LICENSE("GPL v2");
diff --git a/arch/powerpc/platforms/chrp/pci.c b/arch/powerpc/platforms/chrp/pci.c
new file mode 100644
index 000000000..5ddb57b82
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/pci.c
@@ -0,0 +1,380 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * CHRP pci routines.
+ */
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/prom.h>
+#include <asm/machdep.h>
+#include <asm/sections.h>
+#include <asm/pci-bridge.h>
+#include <asm/grackle.h>
+#include <asm/rtas.h>
+
+#include "chrp.h"
+#include "gg2.h"
+
+/* LongTrail */
+void __iomem *gg2_pci_config_base;
+
+/*
+ * The VLSI Golden Gate II has only 512K of PCI configuration space, so we
+ * limit the bus number to 3 bits
+ */
+
+static int gg2_read_config(struct pci_bus *bus, unsigned int devfn, int off,
+			   int len, u32 *val)
+{
+	volatile void __iomem *cfg_data;
+	struct pci_controller *hose = pci_bus_to_host(bus);
+
+	if (bus->number > 7)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	/*
+	 * Note: the caller has already checked that off is
+	 * suitably aligned and that len is 1, 2 or 4.
+	 */
+	cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
+	switch (len) {
+	case 1:
+		*val =  in_8(cfg_data);
+		break;
+	case 2:
+		*val = in_le16(cfg_data);
+		break;
+	default:
+		*val = in_le32(cfg_data);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static int gg2_write_config(struct pci_bus *bus, unsigned int devfn, int off,
+			    int len, u32 val)
+{
+	volatile void __iomem *cfg_data;
+	struct pci_controller *hose = pci_bus_to_host(bus);
+
+	if (bus->number > 7)
+		return PCIBIOS_DEVICE_NOT_FOUND;
+	/*
+	 * Note: the caller has already checked that off is
+	 * suitably aligned and that len is 1, 2 or 4.
+	 */
+	cfg_data = hose->cfg_data + ((bus->number<<16) | (devfn<<8) | off);
+	switch (len) {
+	case 1:
+		out_8(cfg_data, val);
+		break;
+	case 2:
+		out_le16(cfg_data, val);
+		break;
+	default:
+		out_le32(cfg_data, val);
+		break;
+	}
+	return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops gg2_pci_ops =
+{
+	.read = gg2_read_config,
+	.write = gg2_write_config,
+};
+
+/*
+ * Access functions for PCI config space using RTAS calls.
+ */
+static int rtas_read_config(struct pci_bus *bus, unsigned int devfn, int offset,
+			    int len, u32 *val)
+{
+	struct pci_controller *hose = pci_bus_to_host(bus);
+	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
+		| (((bus->number - hose->first_busno) & 0xff) << 16)
+		| (hose->global_number << 24);
+        int ret = -1;
+	int rval;
+
+	rval = rtas_call(rtas_token("read-pci-config"), 2, 2, &ret, addr, len);
+	*val = ret;
+	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
+}
+
+static int rtas_write_config(struct pci_bus *bus, unsigned int devfn, int offset,
+			     int len, u32 val)
+{
+	struct pci_controller *hose = pci_bus_to_host(bus);
+	unsigned long addr = (offset & 0xff) | ((devfn & 0xff) << 8)
+		| (((bus->number - hose->first_busno) & 0xff) << 16)
+		| (hose->global_number << 24);
+	int rval;
+
+	rval = rtas_call(rtas_token("write-pci-config"), 3, 1, NULL,
+			 addr, len, val);
+	return rval? PCIBIOS_DEVICE_NOT_FOUND: PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops rtas_pci_ops =
+{
+	.read = rtas_read_config,
+	.write = rtas_write_config,
+};
+
+volatile struct Hydra __iomem *Hydra = NULL;
+
+int __init
+hydra_init(void)
+{
+	struct device_node *np;
+	struct resource r;
+
+	np = of_find_node_by_name(NULL, "mac-io");
+	if (np == NULL || of_address_to_resource(np, 0, &r)) {
+		of_node_put(np);
+		return 0;
+	}
+	of_node_put(np);
+	Hydra = ioremap(r.start, resource_size(&r));
+	printk("Hydra Mac I/O at %llx\n", (unsigned long long)r.start);
+	printk("Hydra Feature_Control was %x",
+	       in_le32(&Hydra->Feature_Control));
+	out_le32(&Hydra->Feature_Control, (HYDRA_FC_SCC_CELL_EN |
+					   HYDRA_FC_SCSI_CELL_EN |
+					   HYDRA_FC_SCCA_ENABLE |
+					   HYDRA_FC_SCCB_ENABLE |
+					   HYDRA_FC_ARB_BYPASS |
+					   HYDRA_FC_MPIC_ENABLE |
+					   HYDRA_FC_SLOW_SCC_PCLK |
+					   HYDRA_FC_MPIC_IS_MASTER));
+	printk(", now %x\n", in_le32(&Hydra->Feature_Control));
+	return 1;
+}
+
+#define PRG_CL_RESET_VALID 0x00010000
+
+static void __init
+setup_python(struct pci_controller *hose, struct device_node *dev)
+{
+	u32 __iomem *reg;
+	u32 val;
+	struct resource r;
+
+	if (of_address_to_resource(dev, 0, &r)) {
+		printk(KERN_ERR "No address for Python PCI controller\n");
+		return;
+	}
+
+	/* Clear the magic go-slow bit */
+	reg = ioremap(r.start + 0xf6000, 0x40);
+	BUG_ON(!reg); 
+	val = in_be32(&reg[12]);
+	if (val & PRG_CL_RESET_VALID) {
+		out_be32(&reg[12], val & ~PRG_CL_RESET_VALID);
+		in_be32(&reg[12]);
+	}
+	iounmap(reg);
+
+	setup_indirect_pci(hose, r.start + 0xf8000, r.start + 0xf8010, 0);
+}
+
+/* Marvell Discovery II based Pegasos 2 */
+static void __init setup_peg2(struct pci_controller *hose, struct device_node *dev)
+{
+	struct device_node *root = of_find_node_by_path("/");
+	struct device_node *rtas;
+
+	rtas = of_find_node_by_name (root, "rtas");
+	if (rtas) {
+		hose->ops = &rtas_pci_ops;
+		of_node_put(rtas);
+	} else {
+		printk ("RTAS supporting Pegasos OF not found, please upgrade"
+			" your firmware\n");
+	}
+	pci_add_flags(PCI_REASSIGN_ALL_BUS);
+	/* keep the reference to the root node */
+}
+
+void __init
+chrp_find_bridges(void)
+{
+	struct device_node *dev;
+	const int *bus_range;
+	int len, index = -1;
+	struct pci_controller *hose;
+	const unsigned int *dma;
+	const char *model, *machine;
+	int is_longtrail = 0, is_mot = 0, is_pegasos = 0;
+	struct device_node *root = of_find_node_by_path("/");
+	struct resource r;
+	/*
+	 * The PCI host bridge nodes on some machines don't have
+	 * properties to adequately identify them, so we have to
+	 * look at what sort of machine this is as well.
+	 */
+	machine = of_get_property(root, "model", NULL);
+	if (machine != NULL) {
+		is_longtrail = strncmp(machine, "IBM,LongTrail", 13) == 0;
+		is_mot = strncmp(machine, "MOT", 3) == 0;
+		if (strncmp(machine, "Pegasos2", 8) == 0)
+			is_pegasos = 2;
+		else if (strncmp(machine, "Pegasos", 7) == 0)
+			is_pegasos = 1;
+	}
+	for (dev = root->child; dev != NULL; dev = dev->sibling) {
+		if (dev->type == NULL || strcmp(dev->type, "pci") != 0)
+			continue;
+		++index;
+		/* The GG2 bridge on the LongTrail doesn't have an address */
+		if (of_address_to_resource(dev, 0, &r) && !is_longtrail) {
+			printk(KERN_WARNING "Can't use %pOF: no address\n",
+			       dev);
+			continue;
+		}
+		bus_range = of_get_property(dev, "bus-range", &len);
+		if (bus_range == NULL || len < 2 * sizeof(int)) {
+			printk(KERN_WARNING "Can't get bus-range for %pOF\n",
+				dev);
+			continue;
+		}
+		if (bus_range[1] == bus_range[0])
+			printk(KERN_INFO "PCI bus %d", bus_range[0]);
+		else
+			printk(KERN_INFO "PCI buses %d..%d",
+			       bus_range[0], bus_range[1]);
+		printk(" controlled by %pOF", dev);
+		if (!is_longtrail)
+			printk(" at %llx", (unsigned long long)r.start);
+		printk("\n");
+
+		hose = pcibios_alloc_controller(dev);
+		if (!hose) {
+			printk("Can't allocate PCI controller structure for %pOF\n",
+				dev);
+			continue;
+		}
+		hose->first_busno = hose->self_busno = bus_range[0];
+		hose->last_busno = bus_range[1];
+
+		model = of_get_property(dev, "model", NULL);
+		if (model == NULL)
+			model = "<none>";
+		if (strncmp(model, "IBM, Python", 11) == 0) {
+			setup_python(hose, dev);
+		} else if (is_mot
+			   || strncmp(model, "Motorola, Grackle", 17) == 0) {
+			setup_grackle(hose);
+		} else if (is_longtrail) {
+			void __iomem *p = ioremap(GG2_PCI_CONFIG_BASE, 0x80000);
+			hose->ops = &gg2_pci_ops;
+			hose->cfg_data = p;
+			gg2_pci_config_base = p;
+		} else if (is_pegasos == 1) {
+			setup_indirect_pci(hose, 0xfec00cf8, 0xfee00cfc, 0);
+		} else if (is_pegasos == 2) {
+			setup_peg2(hose, dev);
+		} else if (!strncmp(model, "IBM,CPC710", 10)) {
+			setup_indirect_pci(hose,
+					   r.start + 0x000f8000,
+					   r.start + 0x000f8010,
+					   0);
+			if (index == 0) {
+				dma = of_get_property(dev, "system-dma-base",
+							&len);
+				if (dma && len >= sizeof(*dma)) {
+					dma = (unsigned int *)
+						(((unsigned long)dma) +
+						len - sizeof(*dma));
+						pci_dram_offset = *dma;
+				}
+			}
+		} else {
+			printk("No methods for %pOF (model %s), using RTAS\n",
+			       dev, model);
+			hose->ops = &rtas_pci_ops;
+		}
+
+		pci_process_bridge_OF_ranges(hose, dev, index == 0);
+
+		/* check the first bridge for a property that we can
+		   use to set pci_dram_offset */
+		dma = of_get_property(dev, "ibm,dma-ranges", &len);
+		if (index == 0 && dma != NULL && len >= 6 * sizeof(*dma)) {
+			pci_dram_offset = dma[2] - dma[3];
+			printk("pci_dram_offset = %lx\n", pci_dram_offset);
+		}
+	}
+	of_node_put(root);
+}
+
+/* SL82C105 IDE Control/Status Register */
+#define SL82C105_IDECSR                0x40
+
+/* Fixup for Winbond ATA quirk, required for briq mostly because the
+ * 8259 is configured for level sensitive IRQ 14 and so wants the
+ * ATA controller to be set to fully native mode or bad things
+ * will happen.
+ */
+static void chrp_pci_fixup_winbond_ata(struct pci_dev *sl82c105)
+{
+	u8 progif;
+
+	/* If non-briq machines need that fixup too, please speak up */
+	if (!machine_is(chrp) || _chrp_type != _CHRP_briq)
+		return;
+
+	if ((sl82c105->class & 5) != 5) {
+		printk("W83C553: Switching SL82C105 IDE to PCI native mode\n");
+		/* Enable SL82C105 PCI native IDE mode */
+		pci_read_config_byte(sl82c105, PCI_CLASS_PROG, &progif);
+		pci_write_config_byte(sl82c105, PCI_CLASS_PROG, progif | 0x05);
+		sl82c105->class |= 0x05;
+		/* Disable SL82C105 second port */
+		pci_write_config_word(sl82c105, SL82C105_IDECSR, 0x0003);
+		/* Clear IO BARs, they will be reassigned */
+		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_0, 0);
+		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_1, 0);
+		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_2, 0);
+		pci_write_config_dword(sl82c105, PCI_BASE_ADDRESS_3, 0);
+	}
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
+			chrp_pci_fixup_winbond_ata);
+
+/* Pegasos2 firmware version 20040810 configures the built-in IDE controller
+ * in legacy mode, but sets the PCI registers to PCI native mode.
+ * The chip can only operate in legacy mode, so force the PCI class into legacy
+ * mode as well. The same fixup must be done to the class-code property in
+ * the IDE node /pci@80000000/ide@C,1
+ */
+static void chrp_pci_fixup_vt8231_ata(struct pci_dev *viaide)
+{
+	u8 progif;
+	struct pci_dev *viaisa;
+
+	if (!machine_is(chrp) || _chrp_type != _CHRP_Pegasos)
+		return;
+	if (viaide->irq != 14)
+		return;
+
+	viaisa = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8231, NULL);
+	if (!viaisa)
+		return;
+	dev_info(&viaide->dev, "Fixing VIA IDE, force legacy mode on\n");
+
+	pci_read_config_byte(viaide, PCI_CLASS_PROG, &progif);
+	pci_write_config_byte(viaide, PCI_CLASS_PROG, progif & ~0x5);
+	viaide->class &= ~0x5;
+
+	pci_dev_put(viaisa);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_82C586_1, chrp_pci_fixup_vt8231_ata);
diff --git a/arch/powerpc/platforms/chrp/pegasos_eth.c b/arch/powerpc/platforms/chrp/pegasos_eth.c
new file mode 100644
index 000000000..485cf5ef7
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/pegasos_eth.c
@@ -0,0 +1,201 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 2005 Sven Luther <sl@bplan-gmbh.de>
+ *  Thanks to :
+ *	Dale Farnsworth <dale@farnsworth.org>
+ *	Mark A. Greer <mgreer@mvista.com>
+ *	Nicolas DET <nd@bplan-gmbh.de>
+ *	Benjamin Herrenschmidt <benh@kernel.crashing.org>
+ *  And anyone else who helped me on this.
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/mv643xx.h>
+#include <linux/pci.h>
+
+#define PEGASOS2_MARVELL_REGBASE 		(0xf1000000)
+#define PEGASOS2_MARVELL_REGSIZE 		(0x00004000)
+#define PEGASOS2_SRAM_BASE 			(0xf2000000)
+#define PEGASOS2_SRAM_SIZE			(256*1024)
+
+#define PEGASOS2_SRAM_BASE_ETH_PORT0			(PEGASOS2_SRAM_BASE)
+#define PEGASOS2_SRAM_BASE_ETH_PORT1			(PEGASOS2_SRAM_BASE_ETH_PORT0 + (PEGASOS2_SRAM_SIZE / 2) )
+
+
+#define PEGASOS2_SRAM_RXRING_SIZE		(PEGASOS2_SRAM_SIZE/4)
+#define PEGASOS2_SRAM_TXRING_SIZE		(PEGASOS2_SRAM_SIZE/4)
+
+#undef BE_VERBOSE
+
+static struct resource mv643xx_eth_shared_resources[] = {
+	[0] = {
+		.name	= "ethernet shared base",
+		.start	= 0xf1000000 + MV643XX_ETH_SHARED_REGS,
+		.end	= 0xf1000000 + MV643XX_ETH_SHARED_REGS +
+					MV643XX_ETH_SHARED_REGS_SIZE - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device mv643xx_eth_shared_device = {
+	.name		= MV643XX_ETH_SHARED_NAME,
+	.id		= 0,
+	.num_resources	= ARRAY_SIZE(mv643xx_eth_shared_resources),
+	.resource	= mv643xx_eth_shared_resources,
+};
+
+/*
+ * The orion mdio driver only covers shared + 0x4 up to shared + 0x84 - 1
+ */
+static struct resource mv643xx_eth_mvmdio_resources[] = {
+	[0] = {
+		.name	= "ethernet mdio base",
+		.start	= 0xf1000000 + MV643XX_ETH_SHARED_REGS + 0x4,
+		.end	= 0xf1000000 + MV643XX_ETH_SHARED_REGS + 0x83,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct platform_device mv643xx_eth_mvmdio_device = {
+	.name		= "orion-mdio",
+	.id		= -1,
+	.num_resources	= ARRAY_SIZE(mv643xx_eth_mvmdio_resources),
+	.resource	= mv643xx_eth_mvmdio_resources,
+};
+
+static struct resource mv643xx_eth_port1_resources[] = {
+	[0] = {
+		.name	= "eth port1 irq",
+		.start	= 9,
+		.end	= 9,
+		.flags	= IORESOURCE_IRQ,
+	},
+};
+
+static struct mv643xx_eth_platform_data eth_port1_pd = {
+	.shared		= &mv643xx_eth_shared_device,
+	.port_number	= 1,
+	.phy_addr	= MV643XX_ETH_PHY_ADDR(7),
+
+	.tx_sram_addr = PEGASOS2_SRAM_BASE_ETH_PORT1,
+	.tx_sram_size = PEGASOS2_SRAM_TXRING_SIZE,
+	.tx_queue_size = PEGASOS2_SRAM_TXRING_SIZE/16,
+
+	.rx_sram_addr = PEGASOS2_SRAM_BASE_ETH_PORT1 + PEGASOS2_SRAM_TXRING_SIZE,
+	.rx_sram_size = PEGASOS2_SRAM_RXRING_SIZE,
+	.rx_queue_size = PEGASOS2_SRAM_RXRING_SIZE/16,
+};
+
+static struct platform_device eth_port1_device = {
+	.name		= MV643XX_ETH_NAME,
+	.id		= 1,
+	.num_resources	= ARRAY_SIZE(mv643xx_eth_port1_resources),
+	.resource	= mv643xx_eth_port1_resources,
+	.dev = {
+		.platform_data = &eth_port1_pd,
+	},
+};
+
+static struct platform_device *mv643xx_eth_pd_devs[] __initdata = {
+	&mv643xx_eth_shared_device,
+	&mv643xx_eth_mvmdio_device,
+	&eth_port1_device,
+};
+
+/***********/
+/***********/
+#define MV_READ(offset,val) 	{ val = readl(mv643xx_reg_base + offset); }
+#define MV_WRITE(offset,data) writel(data, mv643xx_reg_base + offset)
+
+static void __iomem *mv643xx_reg_base;
+
+static int Enable_SRAM(void)
+{
+	u32 ALong;
+
+	if (mv643xx_reg_base == NULL)
+		mv643xx_reg_base = ioremap(PEGASOS2_MARVELL_REGBASE,
+					PEGASOS2_MARVELL_REGSIZE);
+
+	if (mv643xx_reg_base == NULL)
+		return -ENOMEM;
+
+#ifdef BE_VERBOSE
+	printk("Pegasos II/Marvell MV64361: register remapped from %p to %p\n",
+		(void *)PEGASOS2_MARVELL_REGBASE, (void *)mv643xx_reg_base);
+#endif
+
+	MV_WRITE(MV64340_SRAM_CONFIG, 0);
+
+	MV_WRITE(MV64340_INTEGRATED_SRAM_BASE_ADDR, PEGASOS2_SRAM_BASE >> 16);
+
+	MV_READ(MV64340_BASE_ADDR_ENABLE, ALong);
+	ALong &= ~(1 << 19);
+	MV_WRITE(MV64340_BASE_ADDR_ENABLE, ALong);
+
+	ALong = 0x02;
+	ALong |= PEGASOS2_SRAM_BASE & 0xffff0000;
+	MV_WRITE(MV643XX_ETH_BAR_4, ALong);
+
+	MV_WRITE(MV643XX_ETH_SIZE_REG_4, (PEGASOS2_SRAM_SIZE-1) & 0xffff0000);
+
+	MV_READ(MV643XX_ETH_BASE_ADDR_ENABLE_REG, ALong);
+	ALong &= ~(1 << 4);
+	MV_WRITE(MV643XX_ETH_BASE_ADDR_ENABLE_REG, ALong);
+
+#ifdef BE_VERBOSE
+	printk("Pegasos II/Marvell MV64361: register unmapped\n");
+	printk("Pegasos II/Marvell MV64361: SRAM at %p, size=%x\n", (void*) PEGASOS2_SRAM_BASE, PEGASOS2_SRAM_SIZE);
+#endif
+
+	iounmap(mv643xx_reg_base);
+	mv643xx_reg_base = NULL;
+
+	return 1;
+}
+
+
+/***********/
+/***********/
+static int __init mv643xx_eth_add_pds(void)
+{
+	int ret = 0;
+	static struct pci_device_id pci_marvell_mv64360[] = {
+		{ PCI_DEVICE(PCI_VENDOR_ID_MARVELL, PCI_DEVICE_ID_MARVELL_MV64360) },
+		{ }
+	};
+
+#ifdef BE_VERBOSE
+	printk("Pegasos II/Marvell MV64361: init\n");
+#endif
+
+	if (pci_dev_present(pci_marvell_mv64360)) {
+		ret = platform_add_devices(mv643xx_eth_pd_devs,
+				ARRAY_SIZE(mv643xx_eth_pd_devs));
+
+		if ( Enable_SRAM() < 0)
+		{
+			eth_port1_pd.tx_sram_addr = 0;
+			eth_port1_pd.tx_sram_size = 0;
+			eth_port1_pd.rx_sram_addr = 0;
+			eth_port1_pd.rx_sram_size = 0;
+
+#ifdef BE_VERBOSE
+			printk("Pegasos II/Marvell MV64361: Can't enable the "
+				"SRAM\n");
+#endif
+		}
+	}
+
+#ifdef BE_VERBOSE
+	printk("Pegasos II/Marvell MV64361: init is over\n");
+#endif
+
+	return ret;
+}
+
+device_initcall(mv643xx_eth_add_pds);
diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
new file mode 100644
index 000000000..d6d8ffc02
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -0,0 +1,608 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ */
+
+/*
+ * bootup setup stuff..
+ */
+
+#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/user.h>
+#include <linux/tty.h>
+#include <linux/major.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/pci.h>
+#include <generated/utsrelease.h>
+#include <linux/adb.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/console.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/initrd.h>
+#include <linux/timer.h>
+
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/irq.h>
+#include <asm/hydra.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+#include <asm/i8259.h>
+#include <asm/mpic.h>
+#include <asm/rtas.h>
+#include <asm/xmon.h>
+
+#include "chrp.h"
+#include "gg2.h"
+
+void rtas_indicator_progress(char *, unsigned short);
+
+int _chrp_type;
+EXPORT_SYMBOL(_chrp_type);
+
+static struct mpic *chrp_mpic;
+
+/* Used for doing CHRP event-scans */
+DEFINE_PER_CPU(struct timer_list, heartbeat_timer);
+unsigned long event_scan_interval;
+
+extern unsigned long loops_per_jiffy;
+
+/* To be replaced by RTAS when available */
+static unsigned int __iomem *briq_SPOR;
+
+#ifdef CONFIG_SMP
+extern struct smp_ops_t chrp_smp_ops;
+#endif
+
+static const char *gg2_memtypes[4] = {
+	"FPM", "SDRAM", "EDO", "BEDO"
+};
+static const char *gg2_cachesizes[4] = {
+	"256 KB", "512 KB", "1 MB", "Reserved"
+};
+static const char *gg2_cachetypes[4] = {
+	"Asynchronous", "Reserved", "Flow-Through Synchronous",
+	"Pipelined Synchronous"
+};
+static const char *gg2_cachemodes[4] = {
+	"Disabled", "Write-Through", "Copy-Back", "Transparent Mode"
+};
+
+static const char *chrp_names[] = {
+	"Unknown",
+	"","","",
+	"Motorola",
+	"IBM or Longtrail",
+	"Genesi Pegasos",
+	"Total Impact Briq"
+};
+
+static void chrp_show_cpuinfo(struct seq_file *m)
+{
+	int i, sdramen;
+	unsigned int t;
+	struct device_node *root;
+	const char *model = "";
+
+	root = of_find_node_by_path("/");
+	if (root)
+		model = of_get_property(root, "model", NULL);
+	seq_printf(m, "machine\t\t: CHRP %s\n", model);
+
+	/* longtrail (goldengate) stuff */
+	if (model && !strncmp(model, "IBM,LongTrail", 13)) {
+		/* VLSI VAS96011/12 `Golden Gate 2' */
+		/* Memory banks */
+		sdramen = (in_le32(gg2_pci_config_base + GG2_PCI_DRAM_CTRL)
+			   >>31) & 1;
+		for (i = 0; i < (sdramen ? 4 : 6); i++) {
+			t = in_le32(gg2_pci_config_base+
+						 GG2_PCI_DRAM_BANK0+
+						 i*4);
+			if (!(t & 1))
+				continue;
+			switch ((t>>8) & 0x1f) {
+			case 0x1f:
+				model = "4 MB";
+				break;
+			case 0x1e:
+				model = "8 MB";
+				break;
+			case 0x1c:
+				model = "16 MB";
+				break;
+			case 0x18:
+				model = "32 MB";
+				break;
+			case 0x10:
+				model = "64 MB";
+				break;
+			case 0x00:
+				model = "128 MB";
+				break;
+			default:
+				model = "Reserved";
+				break;
+			}
+			seq_printf(m, "memory bank %d\t: %s %s\n", i, model,
+				   gg2_memtypes[sdramen ? 1 : ((t>>1) & 3)]);
+		}
+		/* L2 cache */
+		t = in_le32(gg2_pci_config_base+GG2_PCI_CC_CTRL);
+		seq_printf(m, "board l2\t: %s %s (%s)\n",
+			   gg2_cachesizes[(t>>7) & 3],
+			   gg2_cachetypes[(t>>2) & 3],
+			   gg2_cachemodes[t & 3]);
+	}
+	of_node_put(root);
+}
+
+/*
+ *  Fixes for the National Semiconductor PC78308VUL SuperI/O
+ *
+ *  Some versions of Open Firmware incorrectly initialize the IRQ settings
+ *  for keyboard and mouse
+ */
+static inline void __init sio_write(u8 val, u8 index)
+{
+	outb(index, 0x15c);
+	outb(val, 0x15d);
+}
+
+static inline u8 __init sio_read(u8 index)
+{
+	outb(index, 0x15c);
+	return inb(0x15d);
+}
+
+static void __init sio_fixup_irq(const char *name, u8 device, u8 level,
+				     u8 type)
+{
+	u8 level0, type0, active;
+
+	/* select logical device */
+	sio_write(device, 0x07);
+	active = sio_read(0x30);
+	level0 = sio_read(0x70);
+	type0 = sio_read(0x71);
+	if (level0 != level || type0 != type || !active) {
+		printk(KERN_WARNING "sio: %s irq level %d, type %d, %sactive: "
+		       "remapping to level %d, type %d, active\n",
+		       name, level0, type0, !active ? "in" : "", level, type);
+		sio_write(0x01, 0x30);
+		sio_write(level, 0x70);
+		sio_write(type, 0x71);
+	}
+}
+
+static void __init sio_init(void)
+{
+	struct device_node *root;
+	const char *model;
+
+	root = of_find_node_by_path("/");
+	if (!root)
+		return;
+
+	model = of_get_property(root, "model", NULL);
+	if (model && !strncmp(model, "IBM,LongTrail", 13)) {
+		/* logical device 0 (KBC/Keyboard) */
+		sio_fixup_irq("keyboard", 0, 1, 2);
+		/* select logical device 1 (KBC/Mouse) */
+		sio_fixup_irq("mouse", 1, 12, 2);
+	}
+
+	of_node_put(root);
+}
+
+
+static void __init pegasos_set_l2cr(void)
+{
+	struct device_node *np;
+
+	/* On Pegasos, enable the l2 cache if needed, as the OF forgets it */
+	if (_chrp_type != _CHRP_Pegasos)
+		return;
+
+	/* Enable L2 cache if needed */
+	np = of_find_node_by_type(NULL, "cpu");
+	if (np != NULL) {
+		const unsigned int *l2cr = of_get_property(np, "l2cr", NULL);
+		if (l2cr == NULL) {
+			printk ("Pegasos l2cr : no cpu l2cr property found\n");
+			goto out;
+		}
+		if (!((*l2cr) & 0x80000000)) {
+			printk ("Pegasos l2cr : L2 cache was not active, "
+				"activating\n");
+			_set_L2CR(0);
+			_set_L2CR((*l2cr) | 0x80000000);
+		}
+	}
+out:
+	of_node_put(np);
+}
+
+static void __noreturn briq_restart(char *cmd)
+{
+	local_irq_disable();
+	if (briq_SPOR)
+		out_be32(briq_SPOR, 0);
+	for(;;);
+}
+
+/*
+ * Per default, input/output-device points to the keyboard/screen
+ * If no card is installed, the built-in serial port is used as a fallback.
+ * But unfortunately, the firmware does not connect /chosen/{stdin,stdout}
+ * the the built-in serial node. Instead, a /failsafe node is created.
+ */
+static __init void chrp_init(void)
+{
+	struct device_node *node;
+	const char *property;
+
+	if (strstr(boot_command_line, "console="))
+		return;
+	/* find the boot console from /chosen/stdout */
+	if (!of_chosen)
+		return;
+	node = of_find_node_by_path("/");
+	if (!node)
+		return;
+	property = of_get_property(node, "model", NULL);
+	if (!property)
+		goto out_put;
+	if (strcmp(property, "Pegasos2"))
+		goto out_put;
+	/* this is a Pegasos2 */
+	property = of_get_property(of_chosen, "linux,stdout-path", NULL);
+	if (!property)
+		goto out_put;
+	of_node_put(node);
+	node = of_find_node_by_path(property);
+	if (!node)
+		return;
+	property = of_get_property(node, "device_type", NULL);
+	if (!property)
+		goto out_put;
+	if (strcmp(property, "serial"))
+		goto out_put;
+	/*
+	 * The 9pin connector is either /failsafe
+	 * or /pci@80000000/isa@C/serial@i2F8
+	 * The optional graphics card has also type 'serial' in VGA mode.
+	 */
+	property = of_get_property(node, "name", NULL);
+	if (!property)
+		goto out_put;
+	if (!strcmp(property, "failsafe") || !strcmp(property, "serial"))
+		add_preferred_console("ttyS", 0, NULL);
+out_put:
+	of_node_put(node);
+}
+
+static void __init chrp_setup_arch(void)
+{
+	struct device_node *root = of_find_node_by_path("/");
+	const char *machine = NULL;
+
+	/* init to some ~sane value until calibrate_delay() runs */
+	loops_per_jiffy = 50000000/HZ;
+
+	if (root)
+		machine = of_get_property(root, "model", NULL);
+	if (machine && strncmp(machine, "Pegasos", 7) == 0) {
+		_chrp_type = _CHRP_Pegasos;
+	} else if (machine && strncmp(machine, "IBM", 3) == 0) {
+		_chrp_type = _CHRP_IBM;
+	} else if (machine && strncmp(machine, "MOT", 3) == 0) {
+		_chrp_type = _CHRP_Motorola;
+	} else if (machine && strncmp(machine, "TotalImpact,BRIQ-1", 18) == 0) {
+		_chrp_type = _CHRP_briq;
+		/* Map the SPOR register on briq and change the restart hook */
+		briq_SPOR = ioremap(0xff0000e8, 4);
+		ppc_md.restart = briq_restart;
+	} else {
+		/* Let's assume it is an IBM chrp if all else fails */
+		_chrp_type = _CHRP_IBM;
+	}
+	of_node_put(root);
+	printk("chrp type = %x [%s]\n", _chrp_type, chrp_names[_chrp_type]);
+
+	rtas_initialize();
+	if (rtas_token("display-character") >= 0)
+		ppc_md.progress = rtas_progress;
+
+	/* use RTAS time-of-day routines if available */
+	if (rtas_token("get-time-of-day") != RTAS_UNKNOWN_SERVICE) {
+		ppc_md.get_boot_time	= rtas_get_boot_time;
+		ppc_md.get_rtc_time	= rtas_get_rtc_time;
+		ppc_md.set_rtc_time	= rtas_set_rtc_time;
+	}
+
+	/* On pegasos, enable the L2 cache if not already done by OF */
+	pegasos_set_l2cr();
+
+	/* Lookup PCI host bridges */
+	chrp_find_bridges();
+
+	/*
+	 *  Temporary fixes for PCI devices.
+	 *  -- Geert
+	 */
+	hydra_init();		/* Mac I/O */
+
+	/*
+	 *  Fix the Super I/O configuration
+	 */
+	sio_init();
+
+	pci_create_OF_bus_map();
+
+	/*
+	 * Print the banner, then scroll down so boot progress
+	 * can be printed.  -- Cort
+	 */
+	if (ppc_md.progress) ppc_md.progress("Linux/PPC "UTS_RELEASE"\n", 0x0);
+}
+
+static void chrp_8259_cascade(struct irq_desc *desc)
+{
+	struct irq_chip *chip = irq_desc_get_chip(desc);
+	unsigned int cascade_irq = i8259_irq();
+
+	if (cascade_irq)
+		generic_handle_irq(cascade_irq);
+
+	chip->irq_eoi(&desc->irq_data);
+}
+
+/*
+ * Finds the open-pic node and sets up the mpic driver.
+ */
+static void __init chrp_find_openpic(void)
+{
+	struct device_node *np, *root;
+	int len, i, j;
+	int isu_size;
+	const unsigned int *iranges, *opprop = NULL;
+	int oplen = 0;
+	unsigned long opaddr;
+	int na = 1;
+
+	np = of_find_node_by_type(NULL, "open-pic");
+	if (np == NULL)
+		return;
+	root = of_find_node_by_path("/");
+	if (root) {
+		opprop = of_get_property(root, "platform-open-pic", &oplen);
+		na = of_n_addr_cells(root);
+	}
+	if (opprop && oplen >= na * sizeof(unsigned int)) {
+		opaddr = opprop[na-1];	/* assume 32-bit */
+		oplen /= na * sizeof(unsigned int);
+	} else {
+		struct resource r;
+		if (of_address_to_resource(np, 0, &r)) {
+			goto bail;
+		}
+		opaddr = r.start;
+		oplen = 0;
+	}
+
+	printk(KERN_INFO "OpenPIC at %lx\n", opaddr);
+
+	iranges = of_get_property(np, "interrupt-ranges", &len);
+	if (iranges == NULL)
+		len = 0;	/* non-distributed mpic */
+	else
+		len /= 2 * sizeof(unsigned int);
+
+	/*
+	 * The first pair of cells in interrupt-ranges refers to the
+	 * IDU; subsequent pairs refer to the ISUs.
+	 */
+	if (oplen < len) {
+		printk(KERN_ERR "Insufficient addresses for distributed"
+		       " OpenPIC (%d < %d)\n", oplen, len);
+		len = oplen;
+	}
+
+	isu_size = 0;
+	if (len > 0 && iranges[1] != 0) {
+		printk(KERN_INFO "OpenPIC irqs %d..%d in IDU\n",
+		       iranges[0], iranges[0] + iranges[1] - 1);
+	}
+	if (len > 1)
+		isu_size = iranges[3];
+
+	chrp_mpic = mpic_alloc(np, opaddr, MPIC_NO_RESET,
+			isu_size, 0, " MPIC    ");
+	if (chrp_mpic == NULL) {
+		printk(KERN_ERR "Failed to allocate MPIC structure\n");
+		goto bail;
+	}
+	j = na - 1;
+	for (i = 1; i < len; ++i) {
+		iranges += 2;
+		j += na;
+		printk(KERN_INFO "OpenPIC irqs %d..%d in ISU at %x\n",
+		       iranges[0], iranges[0] + iranges[1] - 1,
+		       opprop[j]);
+		mpic_assign_isu(chrp_mpic, i - 1, opprop[j]);
+	}
+
+	mpic_init(chrp_mpic);
+	ppc_md.get_irq = mpic_get_irq;
+ bail:
+	of_node_put(root);
+	of_node_put(np);
+}
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
+static struct irqaction xmon_irqaction = {
+	.handler = xmon_irq,
+	.name = "XMON break",
+};
+#endif
+
+static void __init chrp_find_8259(void)
+{
+	struct device_node *np, *pic = NULL;
+	unsigned long chrp_int_ack = 0;
+	unsigned int cascade_irq;
+
+	/* Look for cascade */
+	for_each_node_by_type(np, "interrupt-controller")
+		if (of_device_is_compatible(np, "chrp,iic")) {
+			pic = np;
+			break;
+		}
+	/* Ok, 8259 wasn't found. We need to handle the case where
+	 * we have a pegasos that claims to be chrp but doesn't have
+	 * a proper interrupt tree
+	 */
+	if (pic == NULL && chrp_mpic != NULL) {
+		printk(KERN_ERR "i8259: Not found in device-tree"
+		       " assuming no legacy interrupts\n");
+		return;
+	}
+
+	/* Look for intack. In a perfect world, we would look for it on
+	 * the ISA bus that holds the 8259 but heh... Works that way. If
+	 * we ever see a problem, we can try to re-use the pSeries code here.
+	 * Also, Pegasos-type platforms don't have a proper node to start
+	 * from anyway
+	 */
+	for_each_node_by_name(np, "pci") {
+		const unsigned int *addrp = of_get_property(np,
+				"8259-interrupt-acknowledge", NULL);
+
+		if (addrp == NULL)
+			continue;
+		chrp_int_ack = addrp[of_n_addr_cells(np)-1];
+		break;
+	}
+	of_node_put(np);
+	if (np == NULL)
+		printk(KERN_WARNING "Cannot find PCI interrupt acknowledge"
+		       " address, polling\n");
+
+	i8259_init(pic, chrp_int_ack);
+	if (ppc_md.get_irq == NULL) {
+		ppc_md.get_irq = i8259_irq;
+		irq_set_default_host(i8259_get_host());
+	}
+	if (chrp_mpic != NULL) {
+		cascade_irq = irq_of_parse_and_map(pic, 0);
+		if (!cascade_irq)
+			printk(KERN_ERR "i8259: failed to map cascade irq\n");
+		else
+			irq_set_chained_handler(cascade_irq,
+						chrp_8259_cascade);
+	}
+}
+
+static void __init chrp_init_IRQ(void)
+{
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
+	struct device_node *kbd;
+#endif
+	chrp_find_openpic();
+	chrp_find_8259();
+
+#ifdef CONFIG_SMP
+	/* Pegasos has no MPIC, those ops would make it crash. It might be an
+	 * option to move setting them to after we probe the PIC though
+	 */
+	if (chrp_mpic != NULL)
+		smp_ops = &chrp_smp_ops;
+#endif /* CONFIG_SMP */
+
+	if (_chrp_type == _CHRP_Pegasos)
+		ppc_md.get_irq        = i8259_irq;
+
+#if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_XMON)
+	/* see if there is a keyboard in the device tree
+	   with a parent of type "adb" */
+	for_each_node_by_name(kbd, "keyboard")
+		if (kbd->parent && kbd->parent->type
+		    && strcmp(kbd->parent->type, "adb") == 0)
+			break;
+	of_node_put(kbd);
+	if (kbd)
+		setup_irq(HYDRA_INT_ADB_NMI, &xmon_irqaction);
+#endif
+}
+
+static void __init
+chrp_init2(void)
+{
+#ifdef CONFIG_NVRAM
+	chrp_nvram_init();
+#endif
+
+	request_region(0x20,0x20,"pic1");
+	request_region(0xa0,0x20,"pic2");
+	request_region(0x00,0x20,"dma1");
+	request_region(0x40,0x20,"timer");
+	request_region(0x80,0x10,"dma page reg");
+	request_region(0xc0,0x20,"dma2");
+
+	if (ppc_md.progress)
+		ppc_md.progress("  Have fun!    ", 0x7777);
+}
+
+static int __init chrp_probe(void)
+{
+	const char *dtype = of_get_flat_dt_prop(of_get_flat_dt_root(),
+						"device_type", NULL);
+ 	if (dtype == NULL)
+ 		return 0;
+ 	if (strcmp(dtype, "chrp"))
+		return 0;
+
+	ISA_DMA_THRESHOLD = ~0L;
+	DMA_MODE_READ = 0x44;
+	DMA_MODE_WRITE = 0x48;
+
+	pm_power_off = rtas_power_off;
+
+	chrp_init();
+
+	return 1;
+}
+
+define_machine(chrp) {
+	.name			= "CHRP",
+	.probe			= chrp_probe,
+	.setup_arch		= chrp_setup_arch,
+	.init			= chrp_init2,
+	.show_cpuinfo		= chrp_show_cpuinfo,
+	.init_IRQ		= chrp_init_IRQ,
+	.restart		= rtas_restart,
+	.halt			= rtas_halt,
+	.time_init		= chrp_time_init,
+	.set_rtc_time		= chrp_set_rtc_time,
+	.get_rtc_time		= chrp_get_rtc_time,
+	.calibrate_decr		= generic_calibrate_decr,
+	.phys_mem_access_prot	= pci_phys_mem_access_prot,
+};
diff --git a/arch/powerpc/platforms/chrp/smp.c b/arch/powerpc/platforms/chrp/smp.c
new file mode 100644
index 000000000..f7bb6cb8d
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/smp.c
@@ -0,0 +1,55 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Smp support for CHRP machines.
+ *
+ * Written by Cort Dougan (cort@cs.nmt.edu) borrowing a great
+ * deal of code from the sparc and intel versions.
+ *
+ * Copyright (C) 1999 Cort Dougan <cort@cs.nmt.edu>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp.h>
+#include <linux/interrupt.h>
+#include <linux/kernel_stat.h>
+#include <linux/delay.h>
+#include <linux/spinlock.h>
+
+#include <asm/ptrace.h>
+#include <linux/atomic.h>
+#include <asm/irq.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/smp.h>
+#include <asm/machdep.h>
+#include <asm/mpic.h>
+#include <asm/rtas.h>
+
+static int smp_chrp_kick_cpu(int nr)
+{
+	*(unsigned long *)KERNELBASE = nr;
+	asm volatile("dcbf 0,%0"::"r"(KERNELBASE):"memory");
+
+	return 0;
+}
+
+static void smp_chrp_setup_cpu(int cpu_nr)
+{
+	mpic_setup_this_cpu();
+}
+
+/* CHRP with openpic */
+struct smp_ops_t chrp_smp_ops = {
+	.cause_nmi_ipi = NULL,
+	.message_pass = smp_mpic_message_pass,
+	.probe = smp_mpic_probe,
+	.kick_cpu = smp_chrp_kick_cpu,
+	.setup_cpu = smp_chrp_setup_cpu,
+	.give_timebase = rtas_give_timebase,
+	.take_timebase = rtas_take_timebase,
+};
diff --git a/arch/powerpc/platforms/chrp/time.c b/arch/powerpc/platforms/chrp/time.c
new file mode 100644
index 000000000..acde7bbe0
--- /dev/null
+++ b/arch/powerpc/platforms/chrp/time.c
@@ -0,0 +1,161 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  Copyright (C) 1991, 1992, 1995  Linus Torvalds
+ *
+ * Adapted for PowerPC (PReP) by Gary Thomas
+ * Modified by Cort Dougan (cort@cs.nmt.edu).
+ * Copied and modified from arch/i386/kernel/time.c
+ *
+ */
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/string.h>
+#include <linux/mm.h>
+#include <linux/interrupt.h>
+#include <linux/time.h>
+#include <linux/timex.h>
+#include <linux/kernel_stat.h>
+#include <linux/mc146818rtc.h>
+#include <linux/init.h>
+#include <linux/bcd.h>
+#include <linux/ioport.h>
+
+#include <asm/io.h>
+#include <asm/nvram.h>
+#include <asm/prom.h>
+#include <asm/sections.h>
+#include <asm/time.h>
+
+#include <platforms/chrp/chrp.h>
+
+extern spinlock_t rtc_lock;
+
+#define NVRAM_AS0  0x74
+#define NVRAM_AS1  0x75
+#define NVRAM_DATA 0x77
+
+static int nvram_as1 = NVRAM_AS1;
+static int nvram_as0 = NVRAM_AS0;
+static int nvram_data = NVRAM_DATA;
+
+long __init chrp_time_init(void)
+{
+	struct device_node *rtcs;
+	struct resource r;
+	int base;
+
+	rtcs = of_find_compatible_node(NULL, "rtc", "pnpPNP,b00");
+	if (rtcs == NULL)
+		rtcs = of_find_compatible_node(NULL, "rtc", "ds1385-rtc");
+	if (rtcs == NULL)
+		return 0;
+	if (of_address_to_resource(rtcs, 0, &r)) {
+		of_node_put(rtcs);
+		return 0;
+	}
+	of_node_put(rtcs);
+
+	base = r.start;
+	nvram_as1 = 0;
+	nvram_as0 = base;
+	nvram_data = base + 1;
+
+	return 0;
+}
+
+static int chrp_cmos_clock_read(int addr)
+{
+	if (nvram_as1 != 0)
+		outb(addr>>8, nvram_as1);
+	outb(addr, nvram_as0);
+	return (inb(nvram_data));
+}
+
+static void chrp_cmos_clock_write(unsigned long val, int addr)
+{
+	if (nvram_as1 != 0)
+		outb(addr>>8, nvram_as1);
+	outb(addr, nvram_as0);
+	outb(val, nvram_data);
+	return;
+}
+
+/*
+ * Set the hardware clock. -- Cort
+ */
+int chrp_set_rtc_time(struct rtc_time *tmarg)
+{
+	unsigned char save_control, save_freq_select;
+	struct rtc_time tm = *tmarg;
+
+	spin_lock(&rtc_lock);
+
+	save_control = chrp_cmos_clock_read(RTC_CONTROL); /* tell the clock it's being set */
+
+	chrp_cmos_clock_write((save_control|RTC_SET), RTC_CONTROL);
+
+	save_freq_select = chrp_cmos_clock_read(RTC_FREQ_SELECT); /* stop and reset prescaler */
+
+	chrp_cmos_clock_write((save_freq_select|RTC_DIV_RESET2), RTC_FREQ_SELECT);
+
+	if (!(save_control & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		tm.tm_sec = bin2bcd(tm.tm_sec);
+		tm.tm_min = bin2bcd(tm.tm_min);
+		tm.tm_hour = bin2bcd(tm.tm_hour);
+		tm.tm_mon = bin2bcd(tm.tm_mon);
+		tm.tm_mday = bin2bcd(tm.tm_mday);
+		tm.tm_year = bin2bcd(tm.tm_year);
+	}
+	chrp_cmos_clock_write(tm.tm_sec,RTC_SECONDS);
+	chrp_cmos_clock_write(tm.tm_min,RTC_MINUTES);
+	chrp_cmos_clock_write(tm.tm_hour,RTC_HOURS);
+	chrp_cmos_clock_write(tm.tm_mon,RTC_MONTH);
+	chrp_cmos_clock_write(tm.tm_mday,RTC_DAY_OF_MONTH);
+	chrp_cmos_clock_write(tm.tm_year,RTC_YEAR);
+
+	/* The following flags have to be released exactly in this order,
+	 * otherwise the DS12887 (popular MC146818A clone with integrated
+	 * battery and quartz) will not reset the oscillator and will not
+	 * update precisely 500 ms later. You won't find this mentioned in
+	 * the Dallas Semiconductor data sheets, but who believes data
+	 * sheets anyway ...                           -- Markus Kuhn
+	 */
+	chrp_cmos_clock_write(save_control, RTC_CONTROL);
+	chrp_cmos_clock_write(save_freq_select, RTC_FREQ_SELECT);
+
+	spin_unlock(&rtc_lock);
+	return 0;
+}
+
+void chrp_get_rtc_time(struct rtc_time *tm)
+{
+	unsigned int year, mon, day, hour, min, sec;
+
+	do {
+		sec = chrp_cmos_clock_read(RTC_SECONDS);
+		min = chrp_cmos_clock_read(RTC_MINUTES);
+		hour = chrp_cmos_clock_read(RTC_HOURS);
+		day = chrp_cmos_clock_read(RTC_DAY_OF_MONTH);
+		mon = chrp_cmos_clock_read(RTC_MONTH);
+		year = chrp_cmos_clock_read(RTC_YEAR);
+	} while (sec != chrp_cmos_clock_read(RTC_SECONDS));
+
+	if (!(chrp_cmos_clock_read(RTC_CONTROL) & RTC_DM_BINARY) || RTC_ALWAYS_BCD) {
+		sec = bcd2bin(sec);
+		min = bcd2bin(min);
+		hour = bcd2bin(hour);
+		day = bcd2bin(day);
+		mon = bcd2bin(mon);
+		year = bcd2bin(year);
+	}
+	if (year < 70)
+		year += 100;
+	tm->tm_sec = sec;
+	tm->tm_min = min;
+	tm->tm_hour = hour;
+	tm->tm_mday = day;
+	tm->tm_mon = mon;
+	tm->tm_year = year;
+}