[PATCH 1/4] ppc64: add BPA platform type

From: Arnd Bergmann
Date: Thu Apr 28 2005 - 03:34:59 EST

This adds the basic support for running on BPA machines.

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@xxxxxxxxxx>

Index: linus-2.5/MAINTAINERS
===================================================================
--- linus-2.5.orig/MAINTAINERS 2005-04-22 06:57:27.000000000 +0200
+++ linus-2.5/MAINTAINERS 2005-04-22 06:57:59.000000000 +0200
@@ -493,6 +493,13 @@
W: http://sourceforge.net/projects/bonding/
S: Supported

+BROADBAND PROCESSOR ARCHITECTURE
+P: Arnd Bergmann
+M: arnd@xxxxxxxx
+L: linuxppc64-dev@xxxxxxxxxx
+W: http://linuxppc64.org
+S: Supported
+
BTTV VIDEO4LINUX DRIVER
P: Gerd Knorr
M: kraxel@xxxxxxxxxxx
Index: linus-2.5/arch/ppc64/Kconfig
===================================================================
--- linus-2.5.orig/arch/ppc64/Kconfig 2005-04-22 06:57:28.000000000 +0200
+++ linus-2.5/arch/ppc64/Kconfig 2005-04-22 06:58:22.000000000 +0200
@@ -73,6 +73,10 @@
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"
@@ -252,7 +256,7 @@

config PPC_RTAS
bool
- depends on PPC_PSERIES
+ depends on PPC_PSERIES || PPC_BPA
default y

config RTAS_PROC
Index: linus-2.5/arch/ppc64/Makefile
===================================================================
--- linus-2.5.orig/arch/ppc64/Makefile 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/Makefile 2005-04-22 06:57:59.000000000 +0200
@@ -83,12 +83,14 @@
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
Index: linus-2.5/arch/ppc64/kernel/Makefile
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/Makefile 2005-04-22 06:57:31.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/Makefile 2005-04-22 06:59:10.000000000 +0200
@@ -34,6 +34,8 @@
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
@@ -60,6 +62,7 @@
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

Index: linus-2.5/arch/ppc64/kernel/bpa_setup.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linus-2.5/arch/ppc64/kernel/bpa_setup.c 2005-04-22 06:58:22.000000000 +0200
@@ -0,0 +1,207 @@
+/*
+ * linux/arch/ppc/kernel/bpa_setup.c
+ *
+ * Copyright (C) 1995 Linus Torvalds
+ * Adapted from 'alpha' version by Gary Thomas
+ * Modified by Cort Dougan (cort@xxxxxxxxxx)
+ * 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
+
+extern void pSeries_get_boot_time(struct rtc_time *rtc_time);
+extern void pSeries_get_rtc_time(struct rtc_time *rtc_time);
+extern int pSeries_set_rtc_time(struct rtc_time *rtc_time);
+
+extern unsigned long ppc_proc_freq;
+extern unsigned long ppc_tb_freq;
+
+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 __init bpa_progress(char *s, unsigned short hex)
+{
+ printk("*** %04x : %s\n", hex, s ? s : "");
+}
+
+extern void setup_default_decr(void);
+
+/* Some sane defaults: 125 MHz timebase, 1GHz processor */
+#define DEFAULT_TB_FREQ 125000000UL
+#define DEFAULT_PROC_FREQ (DEFAULT_TB_FREQ * 8)
+
+/* FIXME: consolidate this into rtas.c or similar */
+static void __init pSeries_calibrate_decr(void)
+{
+ struct device_node *cpu;
+ struct div_result divres;
+ unsigned int *fp;
+ int node_found;
+
+ /*
+ * The cpu node should have a timebase-frequency property
+ * to tell us the rate at which the decrementer counts.
+ */
+ cpu = of_find_node_by_type(NULL, "cpu");
+
+ ppc_tb_freq = DEFAULT_TB_FREQ; /* hardcoded default */
+ node_found = 0;
+ if (cpu != 0) {
+ fp = (unsigned int *)get_property(cpu, "timebase-frequency",
+ NULL);
+ if (fp != 0) {
+ node_found = 1;
+ ppc_tb_freq = *fp;
+ }
+ }
+ if (!node_found)
+ printk(KERN_ERR "WARNING: Estimating decrementer frequency "
+ "(not found)\n");
+
+ ppc_proc_freq = DEFAULT_PROC_FREQ;
+ node_found = 0;
+ if (cpu != 0) {
+ fp = (unsigned int *)get_property(cpu, "clock-frequency",
+ NULL);
+ if (fp != 0) {
+ node_found = 1;
+ ppc_proc_freq = *fp;
+ }
+ }
+ if (!node_found)
+ printk(KERN_ERR "WARNING: Estimating processor frequency "
+ "(not found)\n");
+
+ of_node_put(cpu);
+
+ printk(KERN_INFO "time_init: decrementer frequency = %lu.%.6lu MHz\n",
+ ppc_tb_freq/1000000, ppc_tb_freq%1000000);
+ printk(KERN_INFO "time_init: processor frequency = %lu.%.6lu MHz\n",
+ ppc_proc_freq/1000000, ppc_proc_freq%1000000);
+
+ tb_ticks_per_jiffy = ppc_tb_freq / HZ;
+ tb_ticks_per_sec = tb_ticks_per_jiffy * HZ;
+ tb_ticks_per_usec = ppc_tb_freq / 1000000;
+ tb_to_us = mulhwu_scale_factor(ppc_tb_freq, 1000000);
+ div128_by_32(1024*1024, 0, tb_ticks_per_sec, &divres);
+ tb_to_xs = divres.result_low;
+
+ setup_default_decr();
+}
+
+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 = pSeries_get_boot_time,
+ .get_rtc_time = pSeries_get_rtc_time,
+ .set_rtc_time = pSeries_set_rtc_time,
+ .calibrate_decr = pSeries_calibrate_decr,
+ .progress = bpa_progress,
+};
Index: linus-2.5/arch/ppc64/kernel/cpu_setup_power4.S
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/cpu_setup_power4.S 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/cpu_setup_power4.S 2005-04-22 06:57:59.000000000 +0200
@@ -73,7 +73,21 @@

_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 */
Index: linus-2.5/arch/ppc64/kernel/cputable.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/cputable.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/cputable.c 2005-04-22 06:57:59.000000000 +0200
@@ -34,6 +34,7 @@
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 @@
__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 |
Index: linus-2.5/arch/ppc64/kernel/irq.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/irq.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/irq.c 2005-04-22 06:57:59.000000000 +0200
@@ -395,6 +395,9 @@
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;
Index: linus-2.5/arch/ppc64/kernel/proc_ppc64.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/proc_ppc64.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/proc_ppc64.c 2005-04-22 06:57:59.000000000 +0200
@@ -53,7 +53,7 @@
if (!root)
return 1;

- if (!(systemcfg->platform & PLATFORM_PSERIES))
+ if (!(systemcfg->platform & (PLATFORM_PSERIES | PLATFORM_BPA)))
return 0;

if (!proc_mkdir("rtas", root))
Index: linus-2.5/arch/ppc64/kernel/prom_init.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/prom_init.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/prom_init.c 2005-04-22 06:58:20.000000000 +0200
@@ -1731,9 +1731,9 @@
&getprop_rval, sizeof(getprop_rval));

/*
- * 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);

/*
Index: linus-2.5/arch/ppc64/kernel/setup.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/setup.c 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/setup.c 2005-04-22 06:57:59.000000000 +0200
@@ -348,6 +348,7 @@
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[] = {
@@ -360,6 +361,9 @@
#ifdef CONFIG_PPC_MAPLE
&maple_md,
#endif /* CONFIG_PPC_MAPLE */
+#ifdef CONFIG_PPC_BPA
+ &bpa_md,
+#endif
NULL
};

Index: linus-2.5/arch/ppc64/kernel/traps.c
===================================================================
--- linus-2.5.orig/arch/ppc64/kernel/traps.c 2005-04-22 06:57:28.000000000 +0200
+++ linus-2.5/arch/ppc64/kernel/traps.c 2005-04-22 06:57:59.000000000 +0200
@@ -126,6 +126,10 @@
printk("POWERMAC ");
nl = 1;
break;
+ case PLATFORM_BPA:
+ printk("BPA ");
+ nl = 1;
+ break;
}
if (nl)
printk("\n");
Index: linus-2.5/include/asm-ppc64/mmu.h
===================================================================
--- linus-2.5.orig/include/asm-ppc64/mmu.h 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/include/asm-ppc64/mmu.h 2005-04-22 06:57:59.000000000 +0200
@@ -196,6 +196,8 @@
#define SLB_VSID_N 0x0000000000000200 /* no-execute */
#define SLB_VSID_L 0x0000000000000100 /* largepage (4M) */
#define SLB_VSID_C 0x0000000000000080 /* class */
+#define SLB_VSID_LS 0x0000000000000070 /* LS if 1, then second
+ large page size */

#define SLB_VSID_KERNEL (SLB_VSID_KP|SLB_VSID_C)
#define SLB_VSID_USER (SLB_VSID_KP|SLB_VSID_KS)
Index: linus-2.5/include/asm-ppc64/processor.h
===================================================================
--- linus-2.5.orig/include/asm-ppc64/processor.h 2005-04-22 06:57:29.000000000 +0200
+++ linus-2.5/include/asm-ppc64/processor.h 2005-04-22 06:57:59.000000000 +0200
@@ -217,14 +217,22 @@
#define HID0_ABE (1<<3) /* Address Broadcast Enable */
#define HID0_BHTE (1<<2) /* Branch History Table Enable */
#define HID0_BTCD (1<<1) /* Branch target cache disable */
+#define SPRN_HID6 0x3F9 /* Hardware Implementation Register 6 */
+#define HID6_LB (0x0F<<12) /* Concurrent Large Page Modes */
+#define HID6_DLP (1<<20) /* Disable all large page modes (4K only) */
#define SPRN_MSRDORM 0x3F1 /* Hardware Implementation Register 1 */
#define SPRN_HID1 0x3F1 /* Hardware Implementation Register 1 */
#define SPRN_IABR 0x3F2 /* Instruction Address Breakpoint Register */
#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_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_IAC1 0x3F4 /* Instruction Address Compare 1 */
#define SPRN_IAC2 0x3F5 /* Instruction Address Compare 2 */
#define SPRN_ICCR 0x3FB /* Instruction Cache Cacheability Register */
@@ -411,8 +419,9 @@
#define PV_POWER5 0x003A
#define PV_POWER5p 0x003B
#define PV_970FX 0x003C
-#define PV_630 0x0040
-#define PV_630p 0x0041
+#define PV_630 0x0040
+#define PV_630p 0x0041
+#define PV_BE 0x0070

/* Platforms supported by PPC64 */
#define PLATFORM_PSERIES 0x0100
@@ -421,6 +430,7 @@
#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)
@@ -432,6 +442,7 @@
#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)
Index: linus-2.5/include/asm-ppc64/smp.h
===================================================================
--- linus-2.5.orig/include/asm-ppc64/smp.h 2005-04-22 06:52:24.000000000 +0200
+++ linus-2.5/include/asm-ppc64/smp.h 2005-04-22 06:58:20.000000000 +0200
@@ -85,6 +85,14 @@

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) */

-
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