Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

5 files changed, 263 insertions, 0 deletions

diff --git a/arch/sh/boards/saturn/Makefile b/arch/sh/boards/saturn/Makefile
new file mode 100644
index 000000000000..75a3042e252e
--- /dev/null
+++ b/arch/sh/boards/saturn/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the Sega Saturn specific parts of the kernel
+#
+
+obj-y    := setup.o io.o irq.o
+
+obj-$(CONFIG_SMP) += smp.o
+
diff --git a/arch/sh/boards/saturn/io.c b/arch/sh/boards/saturn/io.c
new file mode 100644
index 000000000000..c6e4f7f2e686
--- /dev/null
+++ b/arch/sh/boards/saturn/io.c
@@ -0,0 +1,26 @@
+/*
+ * arch/sh/boards/saturn/io.c
+ *
+ * I/O routines for the Sega Saturn.
+ *
+ * Copyright (C) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <asm/saturn/io.h>
+#include <asm/machvec.h>
+
+unsigned long saturn_isa_port2addr(unsigned long offset)
+{
+        return offset;
+}
+
+void *saturn_ioremap(unsigned long offset, unsigned long size)
+{
+        return (void *)offset;
+}
+
+void saturn_iounmap(void *addr)
+{
+}
+
diff --git a/arch/sh/boards/saturn/irq.c b/arch/sh/boards/saturn/irq.c
new file mode 100644
index 000000000000..15d1d3f0f787
--- /dev/null
+++ b/arch/sh/boards/saturn/irq.c
@@ -0,0 +1,118 @@
+/*
+ * arch/sh/boards/saturn/irq.c
+ *
+ * Copyright (C) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/irq.h>
+#include <asm/io.h>
+
+/*
+ * Interrupts map out as follows:
+ *
+ *  Vector      Name            Mask
+ *
+ *      64      VBLANKIN        0x0001
+ *      65      VBLANKOUT       0x0002
+ *      66      HBLANKIN        0x0004
+ *      67      TIMER0          0x0008
+ *      68      TIMER1          0x0010
+ *      69      DSPEND          0x0020
+ *      70      SOUNDREQUEST    0x0040
+ *      71      SYSTEMMANAGER   0x0080
+ *      72      PAD             0x0100
+ *      73      LEVEL2DMAEND    0x0200
+ *      74      LEVEL1DMAEND    0x0400
+ *      75      LEVEL0DMAEND    0x0800
+ *      76      DMAILLEGAL      0x1000
+ *      77      SRITEDRAWEND    0x2000
+ *      78      ABUS            0x8000
+ *
+ */
+#define SATURN_IRQ_MIN          64      /* VBLANKIN */
+#define SATURN_IRQ_MAX          78      /* ABUS */
+
+#define SATURN_IRQ_MASK         0xbfff
+
+static inline u32 saturn_irq_mask(unsigned int irq_nr)
+{
+        u32 mask;
+
+        mask = (1 << (irq_nr - SATURN_IRQ_MIN));
+        mask <<= (irq_nr == SATURN_IRQ_MAX);
+        mask &= SATURN_IRQ_MASK;
+
+        return mask;
+}
+
+static inline void mask_saturn_irq(unsigned int irq_nr)
+{
+        u32 mask;
+
+        mask = ctrl_inl(SATURN_IMR);
+        mask |= saturn_irq_mask(irq_nr);
+        ctrl_outl(mask, SATURN_IMR);
+}
+
+static inline void unmask_saturn_irq(unsigned int irq_nr)
+{
+        u32 mask;
+
+        mask = ctrl_inl(SATURN_IMR);
+        mask &= ~saturn_irq_mask(irq_nr);
+        ctrl_outl(mask, SATURN_IMR);
+}
+
+static void disable_saturn_irq(unsigned int irq_nr)
+{
+        mask_saturn_irq(irq_nr);
+}
+
+static void enable_saturn_irq(unsigned int irq_nr)
+{
+        unmask_saturn_irq(irq_nr);
+}
+
+static void mask_and_ack_saturn_irq(unsigned int irq_nr)
+{
+        mask_saturn_irq(irq_nr);
+}
+
+static void end_saturn_irq(unsigned int irq_nr)
+{
+        if (!(irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
+                unmask_saturn_irq(irq_nr);
+}
+
+static unsigned int startup_saturn_irq(unsigned int irq_nr)
+{
+        unmask_saturn_irq(irq_nr);
+
+        return 0;
+}
+
+static void shutdown_saturn_irq(unsigned int irq_nr)
+{
+        mask_saturn_irq(irq_nr);
+}
+
+static struct hw_interrupt_type saturn_int = {
+        .typename       = "Saturn",
+        .enable         = enable_saturn_irq,
+        .disable        = disable_saturn_irq,
+        .ack            = mask_and_ack_saturn_irq,
+        .end            = end_saturn_irq,
+        .startup        = startup_saturn_irq,
+        .shutdown       = shutdown_saturn_irq,
+};
+
+int saturn_irq_demux(int irq_nr)
+{
+        /* FIXME */
+        return irq_nr;
+}
+
diff --git a/arch/sh/boards/saturn/setup.c b/arch/sh/boards/saturn/setup.c
new file mode 100644
index 000000000000..bea6c572ad82
--- /dev/null
+++ b/arch/sh/boards/saturn/setup.c
@@ -0,0 +1,43 @@
+/* 
+ * arch/sh/boards/saturn/setup.c
+ *
+ * Hardware support for the Sega Saturn.
+ *
+ * Copyright (c) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+
+#include <asm/io.h>
+#include <asm/machvec.h>
+#include <asm/mach/io.h>
+
+extern int saturn_irq_demux(int irq_nr);
+
+const char *get_system_type(void)
+{
+        return "Sega Saturn";
+}
+
+/*
+ * The Machine Vector
+ */
+struct sh_machine_vector mv_saturn __initmv = {
+        .mv_nr_irqs             = 80,   /* Fix this later */
+
+        .mv_isa_port2addr       = saturn_isa_port2addr,
+        .mv_irq_demux           = saturn_irq_demux,
+
+        .mv_ioremap             = saturn_ioremap,
+        .mv_iounmap             = saturn_iounmap,
+};
+
+ALIAS_MV(saturn)
+
+int __init platform_setup(void)
+{
+        return 0;
+}
+
diff --git a/arch/sh/boards/saturn/smp.c b/arch/sh/boards/saturn/smp.c
new file mode 100644
index 000000000000..76460918c9cd
--- /dev/null
+++ b/arch/sh/boards/saturn/smp.c
@@ -0,0 +1,68 @@
+/* 
+ * arch/sh/boards/saturn/smp.c
+ *
+ * SMP support for the Sega Saturn.
+ *
+ * Copyright (c) 2002 Paul Mundt
+ *
+ * Released under the terms of the GNU GPL v2.0.
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/smp.h>
+
+#include <asm/saturn/smpc.h>
+
+extern void start_secondary(void);
+
+void __smp_send_ipi(unsigned int cpu, unsigned int action)
+{
+        /* Nothing here yet .. */
+}
+
+unsigned int __smp_probe_cpus(void)
+{
+        /*
+         * This is just a straightforward master/slave configuration,
+         * and probing isn't really supported..
+         */
+        return 2;
+}
+
+/*
+ * We're only allowed to do byte-access to SMPC registers. In
+ * addition to which, we treat them as write-only, since
+ * reading from them will return undefined data.
+ */
+static inline void smpc_slave_stop(unsigned int cpu)
+{
+        smpc_barrier();
+        ctrl_outb(1, SMPC_STATUS);
+
+        ctrl_outb(SMPC_CMD_SSHOFF, SMPC_COMMAND);
+        smpc_barrier();
+}
+
+static inline void smpc_slave_start(unsigned int cpu)
+{
+        ctrl_outb(1, SMPC_STATUS);
+        ctrl_outb(SMPC_CMD_SSHON, SMPC_COMMAND);
+
+        smpc_barrier();
+}
+
+void __smp_slave_init(unsigned int cpu)
+{
+        register unsigned long vbr;
+        void **entry;
+
+        __asm__ __volatile__ ("stc vbr, %0\n\t" : "=r" (vbr));
+        entry = (void **)(vbr + 0x310 + 0x94);
+
+        smpc_slave_stop(cpu);
+
+        *(void **)entry = (void *)start_secondary;
+
+        smpc_slave_start(cpu);
+}
+