Linux-2.6.12-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!
diff --git a/arch/v850/kernel/as85ep1.c b/arch/v850/kernel/as85ep1.c
new file mode 100644
index 0000000..4059b1d
--- /dev/null
+++ b/arch/v850/kernel/as85ep1.c
@@ -0,0 +1,240 @@
+/*
+ * arch/v850/kernel/as85ep1.c -- AS85EP1 V850E evaluation chip/board
+ *
+ * Copyright (C) 2002,03 NEC Electronics Corporation
+ * Copyright (C) 2002,03 Miles Bader <miles@gnu.org>
+ *
+ * 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.
+ *
+ * Written by Miles Bader <miles@gnu.org>
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/major.h>
+#include <linux/irq.h>
+
+#include <asm/machdep.h>
+#include <asm/atomic.h>
+#include <asm/page.h>
+#include <asm/v850e_timer_d.h>
+#include <asm/v850e_uart.h>
+
+#include "mach.h"
+
+
+/* SRAM and SDRAM are vaguely contiguous (with a big hole in between; see
+ mach_reserve_bootmem for details); use both as one big area. */
+#define RAM_START SRAM_ADDR
+#define RAM_END (SDRAM_ADDR + SDRAM_SIZE)
+
+/* The bits of this port are connected to an 8-LED bar-graph. */
+#define LEDS_PORT 4
+
+
+static void as85ep1_led_tick (void);
+
+extern char _intv_copy_src_start, _intv_copy_src_end;
+extern char _intv_copy_dst_start;
+
+
+void __init mach_early_init (void)
+{
+#ifndef CONFIG_ROM_KERNEL
+ const u32 *src;
+ register u32 *dst asm ("ep");
+#endif
+
+ AS85EP1_CSC(0) = 0x0403;
+ AS85EP1_BCT(0) = 0xB8B8;
+ AS85EP1_DWC(0) = 0x0104;
+ AS85EP1_BCC = 0x0012;
+ AS85EP1_ASC = 0;
+ AS85EP1_LBS = 0x00A9;
+
+ AS85EP1_PORT_PMC(6) = 0xFF; /* valid A0,A1,A20-A25 */
+ AS85EP1_PORT_PMC(7) = 0x0E; /* valid CS1-CS3 */
+ AS85EP1_PORT_PMC(9) = 0xFF; /* valid D16-D23 */
+ AS85EP1_PORT_PMC(10) = 0xFF; /* valid D24-D31 */
+
+ AS85EP1_RFS(1) = 0x800c;
+ AS85EP1_RFS(3) = 0x800c;
+ AS85EP1_SCR(1) = 0x20A9;
+ AS85EP1_SCR(3) = 0x20A9;
+
+#ifndef CONFIG_ROM_KERNEL
+ /* The early chip we have is buggy, and writing the interrupt
+ vectors into low RAM may screw up, so for non-ROM kernels, we
+ only rely on the reset vector being downloaded, and copy the
+ rest of the interrupt vectors into place here. The specific bug
+ is that writing address N, where (N & 0x10) == 0x10, will _also_
+ write to address (N - 0x10). We avoid this (effectively) by
+ writing in 16-byte chunks backwards from the end. */
+
+ AS85EP1_IRAMM = 0x3; /* "write-mode" for the internal instruction memory */
+
+ src = (u32 *)(((u32)&_intv_copy_src_end - 1) & ~0xF);
+ dst = (u32 *)&_intv_copy_dst_start
+ + (src - (u32 *)&_intv_copy_src_start);
+ do {
+ u32 t0 = src[0], t1 = src[1], t2 = src[2], t3 = src[3];
+ dst[0] = t0; dst[1] = t1; dst[2] = t2; dst[3] = t3;
+ dst -= 4;
+ src -= 4;
+ } while (src > (u32 *)&_intv_copy_src_start);
+
+ AS85EP1_IRAMM = 0x0; /* "read-mode" for the internal instruction memory */
+#endif /* !CONFIG_ROM_KERNEL */
+
+ v850e_intc_disable_irqs ();
+}
+
+void __init mach_setup (char **cmdline)
+{
+ AS85EP1_PORT_PMC (LEDS_PORT) = 0; /* Make the LEDs port an I/O port. */
+ AS85EP1_PORT_PM (LEDS_PORT) = 0; /* Make all the bits output pins. */
+ mach_tick = as85ep1_led_tick;
+}
+
+void __init mach_get_physical_ram (unsigned long *ram_start,
+ unsigned long *ram_len)
+{
+ *ram_start = RAM_START;
+ *ram_len = RAM_END - RAM_START;
+}
+
+/* Convenience macros. */
+#define SRAM_END (SRAM_ADDR + SRAM_SIZE)
+#define SDRAM_END (SDRAM_ADDR + SDRAM_SIZE)
+
+void __init mach_reserve_bootmem ()
+{
+ if (SDRAM_ADDR < RAM_END && SDRAM_ADDR > RAM_START)
+ /* We can't use the space between SRAM and SDRAM, so
+ prevent the kernel from trying. */
+ reserve_bootmem (SRAM_END, SDRAM_ADDR - SRAM_END);
+}
+
+void mach_gettimeofday (struct timespec *tv)
+{
+ tv->tv_sec = 0;
+ tv->tv_nsec = 0;
+}
+
+void __init mach_sched_init (struct irqaction *timer_action)
+{
+ /* Start hardware timer. */
+ v850e_timer_d_configure (0, HZ);
+ /* Install timer interrupt handler. */
+ setup_irq (IRQ_INTCMD(0), timer_action);
+}
+
+static struct v850e_intc_irq_init irq_inits[] = {
+ { "IRQ", 0, NUM_MACH_IRQS, 1, 7 },
+ { "CCC", IRQ_INTCCC(0), IRQ_INTCCC_NUM, 1, 5 },
+ { "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM, 1, 5 },
+ { "SRE", IRQ_INTSRE(0), IRQ_INTSRE_NUM, 3, 3 },
+ { "SR", IRQ_INTSR(0), IRQ_INTSR_NUM, 3, 4 },
+ { "ST", IRQ_INTST(0), IRQ_INTST_NUM, 3, 5 },
+ { 0 }
+};
+#define NUM_IRQ_INITS ((sizeof irq_inits / sizeof irq_inits[0]) - 1)
+
+static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS];
+
+void __init mach_init_irqs (void)
+{
+ v850e_intc_init_irq_types (irq_inits, hw_itypes);
+}
+
+void machine_restart (char *__unused)
+{
+#ifdef CONFIG_RESET_GUARD
+ disable_reset_guard ();
+#endif
+ asm ("jmp r0"); /* Jump to the reset vector. */
+}
+
+EXPORT_SYMBOL(machine_restart);
+
+void machine_halt (void)
+{
+#ifdef CONFIG_RESET_GUARD
+ disable_reset_guard ();
+#endif
+ local_irq_disable (); /* Ignore all interrupts. */
+ AS85EP1_PORT_IO (LEDS_PORT) = 0xAA; /* Note that we halted. */
+ for (;;)
+ asm ("halt; nop; nop; nop; nop; nop");
+}
+
+EXPORT_SYMBOL(machine_halt);
+
+void machine_power_off (void)
+{
+ machine_halt ();
+}
+
+EXPORT_SYMBOL(machine_power_off);
+
+/* Called before configuring an on-chip UART. */
+void as85ep1_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud)
+{
+ /* Make the shared uart/port pins be uart pins. */
+ AS85EP1_PORT_PMC(3) |= (0x5 << chan);
+
+ /* The AS85EP1 connects some general-purpose I/O pins on the CPU to
+ the RTS/CTS lines of UART 1's serial connection. I/O pins P53
+ and P54 are RTS and CTS respectively. */
+ if (chan == 1) {
+ /* Put P53 & P54 in I/O port mode. */
+ AS85EP1_PORT_PMC(5) &= ~0x18;
+ /* Make P53 an output, and P54 an input. */
+ AS85EP1_PORT_PM(5) |= 0x10;
+ }
+}
+
+/* Minimum and maximum bounds for the moving upper LED boundary in the
+ clock tick display. */
+#define MIN_MAX_POS 0
+#define MAX_MAX_POS 7
+
+/* There are MAX_MAX_POS^2 - MIN_MAX_POS^2 cycles in the animation, so if
+ we pick 6 and 0 as above, we get 49 cycles, which is when divided into
+ the standard 100 value for HZ, gives us an almost 1s total time. */
+#define TICKS_PER_FRAME \
+ (HZ / (MAX_MAX_POS * MAX_MAX_POS - MIN_MAX_POS * MIN_MAX_POS))
+
+static void as85ep1_led_tick ()
+{
+ static unsigned counter = 0;
+
+ if (++counter == TICKS_PER_FRAME) {
+ static int pos = 0, max_pos = MAX_MAX_POS, dir = 1;
+
+ if (dir > 0 && pos == max_pos) {
+ dir = -1;
+ if (max_pos == MIN_MAX_POS)
+ max_pos = MAX_MAX_POS;
+ else
+ max_pos--;
+ } else {
+ if (dir < 0 && pos == 0)
+ dir = 1;
+
+ if (pos + dir <= max_pos) {
+ /* Each bit of port 0 has a LED. */
+ set_bit (pos, &AS85EP1_PORT_IO(LEDS_PORT));
+ pos += dir;
+ clear_bit (pos, &AS85EP1_PORT_IO(LEDS_PORT));
+ }
+ }
+
+ counter = 0;
+ }
+}