[PATCH] ppc64: add BPA platform type

This adds the basic support for running on BPA machines.
So far, this is only the IBM workstation, and it will
not run on others without a little more generalization.

It should be possible to configure a kernel for any
combination of CONFIG_PPC_BPA with any of the other
multiplatform targets.

Signed-off-by: Arnd Bergmann <arndb@de.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

15 files changed, 216 insertions, 9 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 4d44824884ef..5eaa6807cdb7 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -504,6 +504,13 @@ L:   bonding-devel@lists.sourceforge.net
 W:   http://sourceforge.net/projects/bonding/
 S:   Supported
 
+BROADBAND PROCESSOR ARCHITECTURE
+P:      Arnd Bergmann
+M:      arnd@arndb.de
+L:      linuxppc64-dev@ozlabs.org
+W:      http://linuxppc64.org
+S:      Supported
+
 BTTV VIDEO4LINUX DRIVER
 P:      Gerd Knorr
 M:      kraxel@bytesex.org
diff --git a/arch/ppc64/Kconfig b/arch/ppc64/Kconfig
index 0f1fa289744e..c7f2f0a4d856 100644
--- a/arch/ppc64/Kconfig
+++ b/arch/ppc64/Kconfig
@@ -77,6 +77,10 @@ config PPC_PSERIES
         bool "  IBM pSeries & new iSeries"
         default y
 
+config PPC_BPA
+        bool "  Broadband Processor Architecture"
+        depends on PPC_MULTIPLATFORM
+
 config PPC_PMAC
         depends on PPC_MULTIPLATFORM
         bool "  Apple G5 based machines"
@@ -256,7 +260,7 @@ config MSCHUNKS
 
 config PPC_RTAS
         bool
-        depends on PPC_PSERIES
+        depends on PPC_PSERIES || PPC_BPA
         default y
 
 config RTAS_PROC
diff --git a/arch/ppc64/Makefile b/arch/ppc64/Makefile
index 33c752ceca4b..731b84758331 100644
--- a/arch/ppc64/Makefile
+++ b/arch/ppc64/Makefile
@@ -90,12 +90,14 @@ boot := arch/ppc64/boot
 boottarget-$(CONFIG_PPC_PSERIES) := zImage zImage.initrd
 boottarget-$(CONFIG_PPC_MAPLE) := zImage zImage.initrd
 boottarget-$(CONFIG_PPC_ISERIES) := vmlinux.sminitrd vmlinux.initrd vmlinux.sm
+boottarget-$(CONFIG_PPC_BPA) := zImage zImage.initrd
 $(boottarget-y): vmlinux
         $(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
 
 bootimage-$(CONFIG_PPC_PSERIES) := $(boot)/zImage
 bootimage-$(CONFIG_PPC_PMAC) := vmlinux
 bootimage-$(CONFIG_PPC_MAPLE) := $(boot)/zImage
+bootimage-$(CONFIG_PPC_BPA) := zImage
 bootimage-$(CONFIG_PPC_ISERIES) := vmlinux
 BOOTIMAGE := $(bootimage-y)
 install: vmlinux
diff --git a/arch/ppc64/kernel/Makefile b/arch/ppc64/kernel/Makefile
index f389f2453daa..c89983ab9098 100644
--- a/arch/ppc64/kernel/Makefile
+++ b/arch/ppc64/kernel/Makefile
@@ -33,6 +33,8 @@ obj-$(CONFIG_PPC_PSERIES) += pSeries_pci.o pSeries_lpar.o pSeries_hvCall.o \
                              pSeries_nvram.o rtasd.o ras.o pSeries_reconfig.o \
                              xics.o pSeries_setup.o pSeries_iommu.o
 
+obj-$(CONFIG_PPC_BPA) += bpa_setup.o bpa_nvram.o
+
 obj-$(CONFIG_EEH)               += eeh.o
 obj-$(CONFIG_PROC_FS)           += proc_ppc64.o
 obj-$(CONFIG_RTAS_FLASH)        += rtas_flash.o
@@ -59,6 +61,7 @@ ifdef CONFIG_SMP
 obj-$(CONFIG_PPC_PMAC)          += pmac_smp.o smp-tbsync.o
 obj-$(CONFIG_PPC_ISERIES)       += iSeries_smp.o
 obj-$(CONFIG_PPC_PSERIES)       += pSeries_smp.o
+obj-$(CONFIG_PPC_BPA)           += pSeries_smp.o
 obj-$(CONFIG_PPC_MAPLE)         += smp-tbsync.o
 endif
 
diff --git a/arch/ppc64/kernel/bpa_setup.c b/arch/ppc64/kernel/bpa_setup.c
new file mode 100644
index 000000000000..d1992dd2d61b
--- /dev/null
+++ b/arch/ppc64/kernel/bpa_setup.c
@@ -0,0 +1,135 @@
+/*
+ *  linux/arch/ppc/kernel/bpa_setup.c
+ *
+ *  Copyright (C) 1995  Linus Torvalds
+ *  Adapted from 'alpha' version by Gary Thomas
+ *  Modified by Cort Dougan (cort@cs.nmt.edu)
+ *  Modified by PPC64 Team, IBM Corp
+ *  Modified by BPA Team, IBM Deutschland Entwicklung GmbH
+ *
+ * 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.
+ */
+#undef DEBUG
+
+#include <linux/config.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/stddef.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/user.h>
+#include <linux/reboot.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/seq_file.h>
+#include <linux/root_dev.h>
+#include <linux/console.h>
+
+#include <asm/mmu.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/pgtable.h>
+#include <asm/prom.h>
+#include <asm/rtas.h>
+#include <asm/pci-bridge.h>
+#include <asm/iommu.h>
+#include <asm/dma.h>
+#include <asm/machdep.h>
+#include <asm/time.h>
+#include <asm/nvram.h>
+#include <asm/cputable.h>
+
+#include "pci.h"
+
+#ifdef DEBUG
+#define DBG(fmt...) udbg_printf(fmt)
+#else
+#define DBG(fmt...)
+#endif
+
+void bpa_get_cpuinfo(struct seq_file *m)
+{
+        struct device_node *root;
+        const char *model = "";
+
+        root = of_find_node_by_path("/");
+        if (root)
+                model = get_property(root, "model", NULL);
+        seq_printf(m, "machine\t\t: BPA %s\n", model);
+        of_node_put(root);
+}
+
+static void bpa_progress(char *s, unsigned short hex)
+{
+        printk("*** %04x : %s\n", hex, s ? s : "");
+}
+
+static void __init bpa_setup_arch(void)
+{
+#ifdef CONFIG_SMP
+        smp_init_pSeries();
+#endif
+
+        /* init to some ~sane value until calibrate_delay() runs */
+        loops_per_jiffy = 50000000;
+
+        if (ROOT_DEV == 0) {
+                printk("No ramdisk, default root is /dev/hda2\n");
+                ROOT_DEV = Root_HDA2;
+        }
+
+        /* Find and initialize PCI host bridges */
+        init_pci_config_tokens();
+        find_and_init_phbs();
+
+#ifdef CONFIG_DUMMY_CONSOLE
+        conswitchp = &dummy_con;
+#endif
+
+        bpa_nvram_init();
+}
+
+/*
+ * Early initialization.  Relocation is on but do not reference unbolted pages
+ */
+static void __init bpa_init_early(void)
+{
+        DBG(" -> bpa_init_early()\n");
+
+        hpte_init_native();
+
+        pci_direct_iommu_init();
+
+        ppc64_interrupt_controller = IC_BPA_IIC;
+
+        DBG(" <- bpa_init_early()\n");
+}
+
+
+static int __init bpa_probe(int platform)
+{
+        if (platform != PLATFORM_BPA)
+                return 0;
+
+        return 1;
+}
+
+struct machdep_calls __initdata bpa_md = {
+        .probe                  = bpa_probe,
+        .setup_arch             = bpa_setup_arch,
+        .init_early             = bpa_init_early,
+        .get_cpuinfo            = bpa_get_cpuinfo,
+        .restart                = rtas_restart,
+        .power_off              = rtas_power_off,
+        .halt                   = rtas_halt,
+        .get_boot_time          = rtas_get_boot_time,
+        .get_rtc_time           = rtas_get_rtc_time,
+        .set_rtc_time           = rtas_set_rtc_time,
+        .calibrate_decr         = generic_calibrate_decr,
+        .progress               = bpa_progress,
+};
diff --git a/arch/ppc64/kernel/cpu_setup_power4.S b/arch/ppc64/kernel/cpu_setup_power4.S
index 3bd951820850..42fc08cf87a0 100644
--- a/arch/ppc64/kernel/cpu_setup_power4.S
+++ b/arch/ppc64/kernel/cpu_setup_power4.S
@@ -73,7 +73,21 @@ _GLOBAL(__970_cpu_preinit)
 
 _GLOBAL(__setup_cpu_power4)
         blr
-        
+
+_GLOBAL(__setup_cpu_be)
+        /* Set large page sizes LP=0: 16MB, LP=1: 64KB */
+        addi    r3, 0,  0
+        ori     r3, r3, HID6_LB
+        sldi    r3, r3, 32
+        nor     r3, r3, r3
+        mfspr   r4, SPRN_HID6
+        and     r4, r4, r3
+        addi    r3, 0, 0x02000
+        sldi    r3, r3, 32
+        or      r4, r4, r3
+        mtspr   SPRN_HID6, r4
+        blr
+
 _GLOBAL(__setup_cpu_ppc970)
         mfspr   r0,SPRN_HID0
         li      r11,5                   /* clear DOZE and SLEEP */
diff --git a/arch/ppc64/kernel/cputable.c b/arch/ppc64/kernel/cputable.c
index 8644a8648058..1d162c7c59df 100644
--- a/arch/ppc64/kernel/cputable.c
+++ b/arch/ppc64/kernel/cputable.c
@@ -34,6 +34,7 @@ EXPORT_SYMBOL(cur_cpu_spec);
 extern void __setup_cpu_power3(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_power4(unsigned long offset, struct cpu_spec* spec);
 extern void __setup_cpu_ppc970(unsigned long offset, struct cpu_spec* spec);
+extern void __setup_cpu_be(unsigned long offset, struct cpu_spec* spec);
 
 
 /* We only set the altivec features if the kernel was compiled with altivec
@@ -162,6 +163,16 @@ struct cpu_spec	cpu_specs[] = {
             __setup_cpu_power4,
             COMMON_PPC64_FW
     },
+    {   /* BE DD1.x  */
+            0xffff0000, 0x00700000, "Broadband Engine",
+            CPU_FTR_SPLIT_ID_CACHE | CPU_FTR_USE_TB | CPU_FTR_HPTE_TABLE |
+                    CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_ALTIVEC_COMP |
+                    CPU_FTR_SMT,
+            COMMON_USER_PPC64 | PPC_FEATURE_HAS_ALTIVEC_COMP,
+            128, 128,
+            __setup_cpu_be,
+            COMMON_PPC64_FW
+    },
     {   /* default match */
             0x00000000, 0x00000000, "POWER4 (compatible)",
             CPU_FTR_SPLIT_ID_CACHE | CPU_FTR_USE_TB | CPU_FTR_HPTE_TABLE |
diff --git a/arch/ppc64/kernel/irq.c b/arch/ppc64/kernel/irq.c
index d860467b8f09..3defc8c33adf 100644
--- a/arch/ppc64/kernel/irq.c
+++ b/arch/ppc64/kernel/irq.c
@@ -395,6 +395,9 @@ int virt_irq_create_mapping(unsigned int real_irq)
         if (ppc64_interrupt_controller == IC_OPEN_PIC)
                 return real_irq;        /* no mapping for openpic (for now) */
 
+        if (ppc64_interrupt_controller == IC_BPA_IIC)
+                return real_irq;        /* no mapping for iic either */
+
         /* don't map interrupts < MIN_VIRT_IRQ */
         if (real_irq < MIN_VIRT_IRQ) {
                 virt_irq_to_real_map[real_irq] = real_irq;
diff --git a/arch/ppc64/kernel/proc_ppc64.c b/arch/ppc64/kernel/proc_ppc64.c
index 0914b0669b05..a87c66a9652a 100644
--- a/arch/ppc64/kernel/proc_ppc64.c
+++ b/arch/ppc64/kernel/proc_ppc64.c
@@ -53,7 +53,7 @@ static int __init proc_ppc64_create(void)
         if (!root)
                 return 1;
 
-        if (!(systemcfg->platform & PLATFORM_PSERIES))
+        if (!(systemcfg->platform & (PLATFORM_PSERIES | PLATFORM_BPA)))
                 return 0;
 
         if (!proc_mkdir("rtas", root))
diff --git a/arch/ppc64/kernel/prom_init.c b/arch/ppc64/kernel/prom_init.c
index b7683abfbe6a..e248a7950aeb 100644
--- a/arch/ppc64/kernel/prom_init.c
+++ b/arch/ppc64/kernel/prom_init.c
@@ -1915,9 +1915,9 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, unsigned long
                 prom_send_capabilities();
 
         /*
-         * On pSeries, copy the CPU hold code
+         * On pSeries and BPA, copy the CPU hold code
          */
-        if (RELOC(of_platform) & PLATFORM_PSERIES)
+        if (RELOC(of_platform) & (PLATFORM_PSERIES | PLATFORM_BPA))
                 copy_and_flush(0, KERNELBASE - offset, 0x100, 0);
 
         /*
diff --git a/arch/ppc64/kernel/setup.c b/arch/ppc64/kernel/setup.c
index 93b0ee88cda1..10222008fe20 100644
--- a/arch/ppc64/kernel/setup.c
+++ b/arch/ppc64/kernel/setup.c
@@ -344,6 +344,7 @@ static void __init setup_cpu_maps(void)
 extern struct machdep_calls pSeries_md;
 extern struct machdep_calls pmac_md;
 extern struct machdep_calls maple_md;
+extern struct machdep_calls bpa_md;
 
 /* Ultimately, stuff them in an elf section like initcalls... */
 static struct machdep_calls __initdata *machines[] = {
@@ -356,6 +357,9 @@ static struct machdep_calls __initdata *machines[] = {
 #ifdef CONFIG_PPC_MAPLE
         &maple_md,
 #endif /* CONFIG_PPC_MAPLE */
+#ifdef CONFIG_PPC_BPA
+        &bpa_md,
+#endif
         NULL
 };
 
diff --git a/arch/ppc64/kernel/traps.c b/arch/ppc64/kernel/traps.c
index 7e52cb2605e0..a8d5e83ee89f 100644
--- a/arch/ppc64/kernel/traps.c
+++ b/arch/ppc64/kernel/traps.c
@@ -126,6 +126,10 @@ int die(const char *str, struct pt_regs *regs, long err)
                         printk("POWERMAC ");
                         nl = 1;
                         break;
+                case PLATFORM_BPA:
+                        printk("BPA ");
+                        nl = 1;
+                        break;
         }
         if (nl)
                 printk("\n");
diff --git a/include/asm-ppc64/mmu.h b/include/asm-ppc64/mmu.h
index c78282a67d8e..9d03a98a4fa3 100644
--- a/include/asm-ppc64/mmu.h
+++ b/include/asm-ppc64/mmu.h
@@ -47,9 +47,10 @@
 #define SLB_VSID_KS             ASM_CONST(0x0000000000000800)
 #define SLB_VSID_KP             ASM_CONST(0x0000000000000400)
 #define SLB_VSID_N              ASM_CONST(0x0000000000000200) /* no-execute */
-#define SLB_VSID_L              ASM_CONST(0x0000000000000100) /* largepage 16M */
+#define SLB_VSID_L              ASM_CONST(0x0000000000000100) /* largepage */
 #define SLB_VSID_C              ASM_CONST(0x0000000000000080) /* class */
-
+#define SLB_VSID_LS             ASM_CONST(0x0000000000000070) /* size of largepage */
+ 
 #define SLB_VSID_KERNEL         (SLB_VSID_KP|SLB_VSID_C)
 #define SLB_VSID_USER           (SLB_VSID_KP|SLB_VSID_KS)
 
diff --git a/include/asm-ppc64/processor.h b/include/asm-ppc64/processor.h
index 3084099086a8..af28aa55d8c1 100644
--- a/include/asm-ppc64/processor.h
+++ b/include/asm-ppc64/processor.h
@@ -138,8 +138,16 @@
 #define SPRN_NIADORM    0x3F3   /* Hardware Implementation Register 2 */
 #define SPRN_HID4       0x3F4   /* 970 HID4 */
 #define SPRN_HID5       0x3F6   /* 970 HID5 */
-#define SPRN_TSC        0x3FD   /* Thread switch control */
-#define SPRN_TST        0x3FC   /* Thread switch timeout */
+#define SPRN_HID6       0x3F9   /* BE HID 6 */
+#define   HID6_LB       (0x0F<<12) /* Concurrent Large Page Modes */
+#define   HID6_DLP      (1<<20) /* Disable all large page modes (4K only) */
+#define SPRN_TSCR       0x399   /* Thread switch control on BE */
+#define SPRN_TTR        0x39A   /* Thread switch timeout on BE */
+#define   TSCR_DEC_ENABLE       0x200000 /* Decrementer Interrupt */
+#define   TSCR_EE_ENABLE        0x100000 /* External Interrupt */
+#define   TSCR_EE_BOOST         0x080000 /* External Interrupt Boost */
+#define SPRN_TSC        0x3FD   /* Thread switch control on others */
+#define SPRN_TST        0x3FC   /* Thread switch timeout on others */
 #define SPRN_L2CR       0x3F9   /* Level 2 Cache Control Regsiter */
 #define SPRN_LR         0x008   /* Link Register */
 #define SPRN_PIR        0x3FF   /* Processor Identification Register */
@@ -259,6 +267,7 @@
 #define PV_970FX        0x003C
 #define PV_630          0x0040
 #define PV_630p         0x0041
+#define PV_BE           0x0070
 
 /* Platforms supported by PPC64 */
 #define PLATFORM_PSERIES      0x0100
@@ -267,6 +276,7 @@
 #define PLATFORM_LPAR         0x0001
 #define PLATFORM_POWERMAC     0x0400
 #define PLATFORM_MAPLE        0x0500
+#define PLATFORM_BPA          0x1000
 
 /* Compatibility with drivers coming from PPC32 world */
 #define _machine        (systemcfg->platform)
@@ -278,6 +288,7 @@
 #define IC_INVALID    0
 #define IC_OPEN_PIC   1
 #define IC_PPC_XIC    2
+#define IC_BPA_IIC    3
 
 #define XGLUE(a,b) a##b
 #define GLUE(a,b) XGLUE(a,b)
diff --git a/include/asm-ppc64/smp.h b/include/asm-ppc64/smp.h
index 8115ecb8feee..d86f742e9a21 100644
--- a/include/asm-ppc64/smp.h
+++ b/include/asm-ppc64/smp.h
@@ -85,6 +85,14 @@ extern void smp_generic_take_timebase(void);
 
 extern struct smp_ops_t *smp_ops;
 
+#ifdef CONFIG_PPC_PSERIES
+void vpa_init(int cpu);
+#else
+static inline void vpa_init(int cpu)
+{
+}
+#endif /* CONFIG_PPC_PSERIES */
+
 #endif /* __ASSEMBLY__ */
 
 #endif /* !(_PPC64_SMP_H) */