M7350v1_en_gpl

bootable/bootloader/lk/platform/armemu/blkdev.c

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2010 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <err.h>
+#include <debug.h>
+#include <platform.h>
+#include "platform_p.h"
+#include <platform/armemu.h>
+#include <lib/bio.h>
+#include <reg.h>
+
+static bdev_t dev;
+
+static uint64_t get_blkdev_len(void)
+{
+	return *REG64(BDEV_LEN);
+}
+
+ssize_t read_block(struct bdev *dev, void *buf, bnum_t block, uint count)
+{
+	/* assume args have been validated by layer above */
+	*REG32(BDEV_CMD_ADDR) = (uint32_t)buf;
+	*REG64(BDEV_CMD_OFF) = (uint64_t)((uint64_t)block * dev->block_size);
+	*REG32(BDEV_CMD_LEN) = count * dev->block_size;
+
+	*REG32(BDEV_CMD) = BDEV_CMD_READ;
+
+	uint32_t err = *REG32(BDEV_CMD) & BDEV_CMD_ERRMASK;
+	if (err == BDEV_CMD_ERR_NONE)
+		return count * dev->block_size;
+	else
+		return ERR_IO;
+}
+
+ssize_t write_block(struct bdev *dev, const void *buf, bnum_t block, uint count)
+{
+	/* assume args have been validated by layer above */
+	*REG32(BDEV_CMD_ADDR) = (uint32_t)buf;
+	*REG64(BDEV_CMD_OFF) = (uint64_t)((uint64_t)block * dev->block_size);
+	*REG32(BDEV_CMD_LEN) = count * dev->block_size;
+
+	*REG32(BDEV_CMD) = BDEV_CMD_WRITE;
+
+	uint32_t err = *REG32(BDEV_CMD) & BDEV_CMD_ERRMASK;
+	if (err == BDEV_CMD_ERR_NONE)
+		return count * dev->block_size;
+	else
+		return ERR_IO;
+}
+
+void platform_init_blkdev(void)
+{
+	if ((*REG32(SYSINFO_FEATURES) & SYSINFO_FEATURE_BLOCKDEV) == 0)
+		return; // no block device
+
+	TRACEF("device len %lld\n", get_blkdev_len());
+
+	if (get_blkdev_len() == 0)
+		return;
+
+	bio_initialize_bdev(&dev, "block0", 512, get_blkdev_len() / 512);
+
+	// fill in hooks
+	dev.read_block = &read_block;
+	dev.write_block = &write_block;
+
+	bio_register_device(&dev);
+}
+

bootable/bootloader/lk/platform/armemu/debug.c

@@ -0,0 +1,99 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <stdarg.h>
+#include <reg.h>
+#include <printf.h>
+#include <kernel/thread.h>
+#include <platform/armemu/memmap.h>
+#include <platform/debug.h>
+
+void _dputc(char c)
+{
+	*REG8(DEBUG_STDOUT) = c;
+}
+
+int dgetc(char *c, bool wait)
+{
+	for (;;) {
+		int8_t result = (int8_t)*REG8(DEBUG_STDIN);
+
+		if (result == -1) {
+			if (wait)
+				continue;
+			else
+				return -1;
+		}
+
+		*c = (char)result;
+		return 0;
+	}
+}
+
+void debug_dump_regs(void)
+{
+	*REG32(DEBUG_REGDUMP) = 1;
+}
+
+void platform_halt(void)
+{
+	*REG32(DEBUG_HALT) = 1;
+	for(;;);
+}
+
+void debug_dump_memory_bytes(void *mem, int len)
+{
+	*REG32(DEBUG_MEMDUMPADDR) = (unsigned int)mem;
+	*REG32(DEBUG_MEMDUMPLEN) = len;
+	*REG32(DEBUG_MEMDUMP_BYTE) = 1;
+}
+
+void debug_dump_memory_halfwords(void *mem, int len)
+{
+	len /= 2;
+
+	*REG32(DEBUG_MEMDUMPADDR) = (unsigned int)mem;
+	*REG32(DEBUG_MEMDUMPLEN) = len;
+	*REG32(DEBUG_MEMDUMP_HALFWORD) = 1;
+}
+
+void debug_dump_memory_words(void *mem, int len)
+{
+	len /= 4;
+
+	*REG32(DEBUG_MEMDUMPADDR) = (unsigned int)mem;
+	*REG32(DEBUG_MEMDUMPLEN) = len;
+	*REG32(DEBUG_MEMDUMP_WORD) = 1;
+}
+
+void debug_set_trace_level(int trace_type, int level)
+{
+	if(trace_type < 0 || trace_type >= 4)
+		return;
+
+	*REG32(DEBUG_SET_TRACELEVEL_CPU + trace_type * 4) = level;
+}
+
+uint32_t debug_cycle_count()
+{
+	return *REG32(DEBUG_CYCLE_COUNT);
+}

bootable/bootloader/lk/platform/armemu/display.c

@@ -0,0 +1,64 @@
+/*
+ * Copyright (c) 2010 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <err.h>
+#include <debug.h>
+#include <platform.h>
+#include "platform_p.h"
+#include <platform/armemu.h>
+#include <dev/display.h>
+#include <lib/gfx.h>
+#include <reg.h>
+
+static int display_w, display_h;
+static void *display_fb;
+
+inline static int has_display(void)
+{
+	return *REG32(SYSINFO_FEATURES) & SYSINFO_FEATURE_DISPLAY;
+}
+
+void platform_init_display(void)
+{
+	if (!has_display())
+		return;
+
+	display_fb = (void *)DISPLAY_FRAMEBUFFER;
+	display_w = *REG32(DISPLAY_WIDTH);
+	display_h = *REG32(DISPLAY_HEIGHT);
+
+	gfx_draw_pattern();
+}
+
+void display_get_info(struct display_info *info)
+{
+	if (!has_display())
+		return;
+
+	info->framebuffer = display_fb;
+	info->format = GFX_FORMAT_RGB_x888;
+	info->width = display_w;
+	info->height = display_h;
+	info->stride = display_w;
+	info->flush = NULL;
+}
+

bootable/bootloader/lk/platform/armemu/include/platform/armemu.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __PLATFORM_ARMEMU_H
+#define __PLATFORM_ARMEMU_H
+
+#include <platform/armemu/memmap.h>
+
+#endif
+

bootable/bootloader/lk/platform/armemu/include/platform/armemu/memmap.h

@@ -0,0 +1,175 @@
+/*
+ * Copyright (c) 2005-2010 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __MEMMAP_H
+#define __MEMMAP_H
+
+#define MEMBANK_SIZE (4*1024*1024)
+
+/* some helpful macros */
+#define REG(x) ((volatile unsigned int *)(x))
+#define REG_H(x) ((volatile unsigned short *)(x))
+#define REG_B(x) ((volatile unsigned char *)(x))
+
+/* memory map of our generic arm system */
+// XXX make more dynamic
+#define MAINMEM_BASE 0x0
+#define MAINMEM_SIZE (MEMBANK_SIZE)
+
+/* peripherals are all mapped here */
+#define PERIPHERAL_BASE   (0xf0000000)
+
+/* system info */
+#define SYSINFO_REGS_BASE (PERIPHERAL_BASE)
+#define SYSINFO_REGS_SIZE MEMBANK_SIZE
+#define SYSINFO_FEATURES  (SYSINFO_REGS_BASE + 0)
+#define SYSINFO_FEATURE_DISPLAY 0x00000001
+#define SYSINFO_FEATURE_CONSOLE 0x00000002
+#define SYSINFO_FEATURE_NETWORK 0x00000004
+#define SYSINFO_FEATURE_BLOCKDEV 0x00000008
+
+    /* a write to this register latches the current emulator system time, so the next two regs can be read atomically */
+#define SYSINFO_TIME_LATCH (SYSINFO_REGS_BASE + 4)
+    /* gettimeofday() style time values */
+#define SYSINFO_TIME_SECS  (SYSINFO_REGS_BASE + 8)
+#define SYSINFO_TIME_USECS (SYSINFO_REGS_BASE + 12)
+
+/* display */
+#define DISPLAY_BASE      (SYSINFO_REGS_BASE + SYSINFO_REGS_SIZE)
+#define DISPLAY_SIZE      MEMBANK_SIZE
+#define DISPLAY_FRAMEBUFFER DISPLAY_BASE
+#define DISPLAY_REGS_BASE (DISPLAY_BASE + DISPLAY_SIZE)
+#define DISPLAY_REGS_SIZE MEMBANK_SIZE
+
+#define DISPLAY_WIDTH     (DISPLAY_REGS_BASE + 0) // pixels width/height read/only
+#define DISPLAY_HEIGHT    (DISPLAY_REGS_BASE + 4)
+#define DISPLAY_BPP       (DISPLAY_REGS_BASE + 8) // bits per pixel (16/32)
+
+/* console (keyboard controller */
+#define CONSOLE_REGS_BASE (DISPLAY_REGS_BASE + DISPLAY_REGS_SIZE)
+#define CONSOLE_REGS_SIZE MEMBANK_SIZE
+#define KYBD_STAT         (CONSOLE_REGS_BASE + 0)
+#define KYBD_DATA         (CONSOLE_REGS_BASE + 4)
+
+/* programmable timer */
+#define PIT_REGS_BASE     (CONSOLE_REGS_BASE + CONSOLE_REGS_SIZE)
+#define PIT_REGS_SIZE     MEMBANK_SIZE
+#define PIT_STATUS        (PIT_REGS_BASE + 0) // status bit
+#define PIT_CLEAR         (PIT_REGS_BASE + 4) // a nonzero write clears any pending timer
+#define PIT_CLEAR_INT     (PIT_REGS_BASE + 8) // a nonzero write clears the pending interrupt
+#define PIT_INTERVAL      (PIT_REGS_BASE + 12) // set the countdown interval, and what the interval is reset to if periodic
+#define PIT_START_ONESHOT (PIT_REGS_BASE + 16) // a nonzero write starts a oneshot countdown
+#define PIT_START_PERIODIC (PIT_REGS_BASE + 20) // a nonzero write starts a periodic countdown
+
+#define PIT_STATUS_ACTIVE    0x1
+#define PIT_STATUS_INT_PEND  0x2
+
+/* interrupt controller */
+#define PIC_REGS_BASE     (PIT_REGS_BASE + PIT_REGS_SIZE)
+#define PIC_REGS_SIZE     MEMBANK_SIZE
+
+    /* Current vector mask, read-only */
+#define PIC_MASK          (PIC_REGS_BASE + 0)
+    /* Mask any of the 32 interrupt vectors by writing a 1 in the appropriate bit */
+#define PIC_MASK_LATCH    (PIC_REGS_BASE + 4)
+	/* Unmask any of the 32 interrupt vectors by writing a 1 in the appropriate bit */
+#define PIC_UNMASK_LATCH  (PIC_REGS_BASE + 8)
+	/* each bit corresponds to the current status of the interrupt line */
+#define PIC_STAT          (PIC_REGS_BASE + 12)
+	/* one bit set for the highest priority non-masked active interrupt */
+#define PIC_CURRENT_BIT   (PIC_REGS_BASE + 16)
+	/* holds the current interrupt number of the highest priority non-masked active interrupt, 
+	 * or 0xffffffff if no interrupt is active
+	 */
+#define PIC_CURRENT_NUM   (PIC_REGS_BASE + 20)
+
+	/* interrupt map */
+#define INT_PIT      0
+#define INT_KEYBOARD 1
+#define INT_NET      2
+#define PIC_MAX_INT 32
+
+/* debug interface */
+#define DEBUG_REGS_BASE (PIC_REGS_BASE + PIC_REGS_SIZE)
+#define DEBUG_REGS_SIZE MEMBANK_SIZE
+#define DEBUG_STDOUT (DEBUG_REGS_BASE + 0) /* writes to this register are sent through to stdout */
+#define DEBUG_STDIN  (DEBUG_REGS_BASE + 0) /* reads from this register return the contents of stdin
+                                            * or -1 if no data is pending */
+#define DEBUG_REGDUMP (DEBUG_REGS_BASE + 4) /* writes to this register cause the emulator to dump registers */
+#define DEBUG_HALT    (DEBUG_REGS_BASE + 8) /* writes to this register will halt the emulator */
+
+#define DEBUG_MEMDUMPADDR (DEBUG_REGS_BASE + 12)      /* set the base address of memory to dump */
+#define DEBUG_MEMDUMPLEN  (DEBUG_REGS_BASE + 16)      /* set the length of memory to dump */
+#define DEBUG_MEMDUMP_BYTE  (DEBUG_REGS_BASE + 20)    /* trigger a memory dump in byte format */
+#define DEBUG_MEMDUMP_HALFWORD (DEBUG_REGS_BASE + 24) /* trigger a memory dump in halfword format */
+#define DEBUG_MEMDUMP_WORD (DEBUG_REGS_BASE + 28)     /* trigger a memory dump in word format */
+
+/* lets you set the trace level of the various subsystems from within the emulator */
+/* only works on emulator builds that support dynamic trace levels */
+#define DEBUG_SET_TRACELEVEL_CPU (DEBUG_REGS_BASE + 32)
+#define DEBUG_SET_TRACELEVEL_UOP (DEBUG_REGS_BASE + 36)
+#define DEBUG_SET_TRACELEVEL_SYS (DEBUG_REGS_BASE + 40)
+#define DEBUG_SET_TRACELEVEL_MMU (DEBUG_REGS_BASE + 44)
+
+#define DEBUG_CYCLE_COUNT (DEBUG_REGS_BASE + 48)
+#define DEBUG_INS_COUNT (DEBUG_REGS_BASE + 52)
+
+/* network interface */
+#define NET_REGS_BASE (DEBUG_REGS_BASE + DEBUG_REGS_SIZE)
+#define NET_REGS_SIZE MEMBANK_SIZE
+
+#define NET_BUF_LEN 2048
+#define NET_IN_BUF_COUNT 32
+
+#define NET_HEAD	(NET_REGS_BASE + 0)		/* current next buffer the hardware will write to */
+#define NET_TAIL	(NET_REGS_BASE + 4)		/* currently selected input buffer */
+#define NET_SEND	(NET_REGS_BASE + 8)		/* writes to this register sends whatever is in the out buf */
+#define NET_SEND_LEN (NET_REGS_BASE + 12)	/* length of packet to send */
+#define NET_OUT_BUF (NET_REGS_BASE + NET_BUF_LEN)
+
+#define NET_IN_BUF_LEN (NET_REGS_BASE + 16)	/* length of the currently selected in buffer, via tail register */
+#define NET_IN_BUF	(NET_REGS_BASE + NET_BUF_LEN*2)
+
+/* block device interface */
+#define BDEV_REGS_BASE (NET_REGS_BASE + NET_REGS_SIZE)
+#define BDEV_REGS_SIZE MEMBANK_SIZE
+
+#define BDEV_CMD	(BDEV_REGS_BASE + 0)	/* command */
+#define BDEV_CMD_ADDR	(BDEV_REGS_BASE + 4)	/* address of next transfer, 32bit */
+#define BDEV_CMD_OFF	(BDEV_REGS_BASE + 8)	/* offset of next transfer, 64bit */
+#define BDEV_CMD_LEN	(BDEV_REGS_BASE + 16)	/* length of next transfer, 32bit */
+
+#define BDEV_LEN	(BDEV_REGS_BASE + 20)	/* length of block device, 64bit */
+
+/* BDEV_CMD bits */
+#define BDEV_CMD_MASK	(0x3)
+#define BDEV_CMD_NOP	(0)
+#define BDEV_CMD_READ	(1)
+#define BDEV_CMD_WRITE	(2)
+#define BDEV_CMD_ERASE	(3)
+#define BDEV_CMD_ERRSHIFT	16
+#define BDEV_CMD_ERRMASK	(0xffff << BDEV_CMD_ERRSHIFT)
+#define BDEV_CMD_ERR_NONE (0 << BDEV_CMD_ERRSHIFT)
+#define BDEV_CMD_ERR_GENERAL (1 << BDEV_CMD_ERRSHIFT)
+#define BDEV_CMD_ERR_BAD_OFFSET (2 << BDEV_CMD_ERRSHIFT)
+
+#endif

bootable/bootloader/lk/platform/armemu/interrupts.c

@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <err.h>
+#include <sys/types.h>
+#include <debug.h>
+#include <reg.h>
+#include <kernel/thread.h>
+#include <platform/interrupts.h>
+#include <platform/armemu.h>
+#include <arch/ops.h>
+#include <arch/arm.h>
+#include "platform_p.h"
+
+struct int_handler_struct {
+	int_handler handler;
+	void *arg;
+};
+
+static struct int_handler_struct int_handler_table[PIC_MAX_INT];
+
+void platform_init_interrupts(void)
+{
+	// mask all the interrupts
+	*REG32(PIC_MASK_LATCH) = 0xffffffff;
+}
+
+status_t mask_interrupt(unsigned int vector)
+{
+	if (vector >= PIC_MAX_INT)
+		return ERR_INVALID_ARGS;
+
+//	dprintf("%s: vector %d\n", __PRETTY_FUNCTION__, vector);
+
+	enter_critical_section();
+
+	*REG32(PIC_MASK_LATCH) = 1 << vector;
+
+	exit_critical_section();
+
+	return NO_ERROR;
+}
+
+status_t unmask_interrupt(unsigned int vector)
+{
+	if (vector >= PIC_MAX_INT)
+		return ERR_INVALID_ARGS;
+
+//	dprintf("%s: vector %d\n", __PRETTY_FUNCTION__, vector);
+
+	enter_critical_section();
+
+	*REG32(PIC_UNMASK_LATCH) = 1 << vector;
+
+	exit_critical_section();
+
+	return NO_ERROR;
+}
+
+enum handler_return platform_irq(struct arm_iframe *frame)
+{
+	// get the current vector
+	unsigned int vector = *REG32(PIC_CURRENT_NUM);
+	if (vector == 0xffffffff)
+		return INT_NO_RESCHEDULE;
+
+//	dprintf("platform_irq: spsr 0x%x, pc 0x%x, currthread %p, vector %d\n", frame->spsr, frame->pc, current_thread, vector);
+
+	// deliver the interrupt
+	enum handler_return ret; 
+
+	ret = INT_NO_RESCHEDULE;
+	if (int_handler_table[vector].handler)
+		ret = int_handler_table[vector].handler(int_handler_table[vector].arg);
+
+//	dprintf("platform_irq: exit %d\n", ret);
+
+	return ret;
+}
+
+void platform_fiq(struct arm_iframe *frame)
+{
+	panic("FIQ: unimplemented\n");
+}
+
+void register_int_handler(unsigned int vector, int_handler handler, void *arg)
+{
+	if (vector >= PIC_MAX_INT)
+		panic("register_int_handler: vector out of range %d\n", vector);
+
+	enter_critical_section();
+
+	int_handler_table[vector].handler = handler;
+	int_handler_table[vector].arg = arg;
+
+	exit_critical_section();
+}
+

bootable/bootloader/lk/platform/armemu/net.c

@@ -0,0 +1,398 @@
+#if WITH_LWIP
+/*
+ * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
+ * All rights reserved. 
+ * 
+ * Redistribution and use in source and binary forms, with or without modification, 
+ * are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 
+ * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 
+ * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
+ * OF SUCH DAMAGE.
+ *
+ * This file is part of the lwIP TCP/IP stack.
+ * 
+ * Author: Adam Dunkels <adam@sics.se>
+ *
+ */
+
+/*
+ * This file is a skeleton for developing Ethernet network interface
+ * drivers for lwIP. Add code to the low_level functions and do a
+ * search-and-replace for the word "ethernetif" to replace it with
+ * something that better describes your network interface.
+ */
+/*
+ * ARMEMU bits
+ * Copyright (c) 2006 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <malloc.h>
+#include <dev/ethernet.h>
+#include <err.h>
+#include <reg.h>
+#include <string.h>
+#include <platform/interrupts.h>
+#include <platform/armemu/memmap.h>
+
+#include "lwip/opt.h"
+#include "lwip/def.h"
+#include "lwip/mem.h"
+#include "lwip/pbuf.h"
+#include "lwip/sys.h"
+#include <lwip/stats.h>
+
+#include "netif/etharp.h"
+
+/* Define those to better describe your network interface. */
+#define IFNAME0 'e'
+#define IFNAME1 'n'
+
+struct ethernetif {
+  struct eth_addr *ethaddr;
+  /* Add whatever per-interface state that is needed here. */
+};
+
+static const struct eth_addr ethbroadcast = {{0xff,0xff,0xff,0xff,0xff,0xff}};
+
+/* Forward declarations. */
+static void  ethernetif_input(struct netif *netif);
+static err_t ethernetif_output(struct netif *netif, struct pbuf *p,
+             struct ip_addr *ipaddr);
+
+static void
+low_level_init(struct netif *netif)
+{
+  struct ethernetif *ethernetif = netif->state;
+  
+  /* set MAC hardware address length */
+  netif->hwaddr_len = 6;
+
+  /* set MAC hardware address */
+  netif->hwaddr[0] = 0;
+  netif->hwaddr[1] = 0x01;
+  netif->hwaddr[2] = 0x02;
+  netif->hwaddr[3] = 0x03;
+  netif->hwaddr[4] = 0x04;
+  netif->hwaddr[5] = 0x05;
+
+  /* maximum transfer unit */
+  netif->mtu = 1500;
+  
+  /* broadcast capability */
+  netif->flags = NETIF_FLAG_BROADCAST;
+ 
+  /* Do whatever else is needed to initialize interface. */  
+}
+
+/*
+ * low_level_output():
+ *
+ * Should do the actual transmission of the packet. The packet is
+ * contained in the pbuf that is passed to the function. This pbuf
+ * might be chained.
+ *
+ */
+
+static err_t
+low_level_output(struct netif *netif, struct pbuf *p)
+{
+  struct ethernetif *ethernetif = netif->state;
+  struct pbuf *q;
+  int i;
+  int j;
+
+#if ETH_PAD_SIZE
+  pbuf_header(p, -ETH_PAD_SIZE);			/* drop the padding word */
+#endif
+
+  /* XXX maybe just a mutex? */
+  enter_critical_section();
+
+  i = 0;
+  for(q = p; q != NULL; q = q->next) {
+    /* Send the data from the pbuf to the interface, one pbuf at a
+       time. The size of the data in each pbuf is kept in the ->len
+       variable. */
+//	debug_dump_memory_bytes(q->payload, q->len);
+	for (j = 0; j < q->len; j++)
+		*REG8(NET_OUT_BUF + i + j) = ((unsigned char *)q->payload)[j];
+	i += q->len;
+  }
+
+  *REG(NET_SEND_LEN) = i;
+  *REG(NET_SEND) = 1;
+
+  exit_critical_section();
+
+#if ETH_PAD_SIZE
+  pbuf_header(p, ETH_PAD_SIZE);			/* reclaim the padding word */
+#endif
+  
+#if LINK_STATS
+  lwip_stats.link.xmit++;
+#endif /* LINK_STATS */      
+
+  return ERR_OK;
+}
+
+/*
+ * low_level_input():
+ *
+ * Should allocate a pbuf and transfer the bytes of the incoming
+ * packet from the interface into the pbuf.
+ *
+ */
+
+static struct pbuf *
+low_level_input(struct netif *netif)
+{
+  struct ethernetif *ethernetif = netif->state;
+  struct pbuf *p, *q;
+  u16_t len;
+  int i;
+  int head, tail;
+
+  /* get the head and tail pointers from the ethernet interface */
+  head = *REG(NET_HEAD);
+  tail = *REG(NET_TAIL);
+
+  if (tail == head)
+	  return NULL; // false alarm
+
+  /* Obtain the size of the packet and put it into the "len"
+     variable. */
+  len = *REG(NET_IN_BUF_LEN);
+
+#if ETH_PAD_SIZE
+  len += ETH_PAD_SIZE;						/* allow room for Ethernet padding */
+#endif
+
+  /* We allocate a pbuf chain of pbufs from the pool. */
+  p = pbuf_alloc(PBUF_RAW, len, PBUF_POOL);
+  if (p != NULL) {
+
+#if ETH_PAD_SIZE
+    pbuf_header(p, -ETH_PAD_SIZE);			/* drop the padding word */
+#endif
+
+    /* We iterate over the pbuf chain until we have read the entire
+     * packet into the pbuf. */
+    int pos = 0;
+    for(q = p; q != NULL; q = q->next) {
+      /* Read enough bytes to fill this pbuf in the chain. The
+       * available data in the pbuf is given by the q->len
+       * variable. */
+	  for (i=0; i < q->len; i++) {
+		 ((unsigned char *)q->payload)[i] = *REG8(NET_IN_BUF + pos);
+		 pos++;
+	  }
+    }
+
+#if ETH_PAD_SIZE
+    pbuf_header(p, ETH_PAD_SIZE);			/* reclaim the padding word */
+#endif
+
+#if LINK_STATS
+    lwip_stats.link.recv++;
+#endif /* LINK_STATS */      
+  } else {
+#if LINK_STATS
+    lwip_stats.link.memerr++;
+    lwip_stats.link.drop++;
+#endif /* LINK_STATS */      
+  }
+
+  /* push the tail pointer up by one, giving the buffer back to the hardware */
+  *REG(NET_TAIL) = (tail + 1) % NET_IN_BUF_COUNT;
+
+  return p;  
+}
+
+/*
+ * ethernetif_output():
+ *
+ * This function is called by the TCP/IP stack when an IP packet
+ * should be sent. It calls the function called low_level_output() to
+ * do the actual transmission of the packet.
+ *
+ */
+
+static err_t
+ethernetif_output(struct netif *netif, struct pbuf *p,
+      struct ip_addr *ipaddr)
+{
+//	dprintf("ethernetif_output: netif %p, pbuf %p, ipaddr %p\n", netif, p, ipaddr);
+  
+ /* resolve hardware address, then send (or queue) packet */
+  return etharp_output(netif, ipaddr, p);
+ 
+}
+
+/*
+ * ethernetif_input():
+ *
+ * This function should be called when a packet is ready to be read
+ * from the interface. It uses the function low_level_input() that
+ * should handle the actual reception of bytes from the network
+ * interface.
+ *
+ */
+
+static void
+ethernetif_input(struct netif *netif)
+{
+  struct ethernetif *ethernetif;
+  struct eth_hdr *ethhdr;
+  struct pbuf *p;
+
+  ethernetif = netif->state;
+  
+  /* move received packet into a new pbuf */
+  p = low_level_input(netif);
+  /* no packet could be read, silently ignore this */
+  if (p == NULL) return;
+  /* points to packet payload, which starts with an Ethernet header */
+  ethhdr = p->payload;
+
+#if LINK_STATS
+  lwip_stats.link.recv++;
+#endif /* LINK_STATS */
+
+  ethhdr = p->payload;
+
+//  dprintf("ethernetif_input: type 0x%x\n", htons(ethhdr->type));
+    
+  switch (htons(ethhdr->type)) {
+  /* IP packet? */
+  case ETHTYPE_IP:
+    /* update ARP table */
+    etharp_ip_input(netif, p);
+    /* skip Ethernet header */
+    pbuf_header(p, -sizeof(struct eth_hdr));
+    /* pass to network layer */
+    netif->input(p, netif);
+    break;
+      
+    case ETHTYPE_ARP:
+      /* pass p to ARP module  */
+      etharp_arp_input(netif, ethernetif->ethaddr, p);
+      break;
+    default:
+      pbuf_free(p);
+      p = NULL;
+      break;
+  }
+}
+
+static enum handler_return ethernet_int(void *arg)
+{
+	struct netif *netif = (struct netif *)arg;
+
+	ethernetif_input(netif);
+
+	return INT_RESCHEDULE;
+}
+
+
+
+/*
+ * ethernetif_init():
+ *
+ * Should be called at the beginning of the program to set up the
+ * network interface. It calls the function low_level_init() to do the
+ * actual setup of the hardware.
+ *
+ */
+
+static err_t
+ethernetif_init(struct netif *netif)
+{
+  struct ethernetif *ethernetif;
+    
+  ethernetif = mem_malloc(sizeof(struct ethernetif));
+  
+  if (ethernetif == NULL)
+  {
+  	LWIP_DEBUGF(NETIF_DEBUG, ("ethernetif_init: out of memory\n"));
+  	return ERR_MEM;
+  }
+  
+  netif->state = ethernetif;
+  netif->name[0] = IFNAME0;
+  netif->name[1] = IFNAME1;
+  netif->output = ethernetif_output;
+  netif->linkoutput = low_level_output;
+  
+  ethernetif->ethaddr = (struct eth_addr *)&(netif->hwaddr[0]);
+  
+  low_level_init(netif);
+
+  return ERR_OK;
+}
+
+status_t ethernet_init(void)
+{
+	/* check to see if the ethernet feature is turned on */
+	if ((*REG(SYSINFO_FEATURES) & SYSINFO_FEATURE_NETWORK) == 0)
+		return ERR_NOT_FOUND;
+
+	struct netif *netif = calloc(sizeof(struct netif), 1);
+	struct ip_addr *ipaddr = calloc(sizeof(struct ip_addr), 1);
+	struct ip_addr *netmask = calloc(sizeof(struct ip_addr), 1);
+	struct ip_addr *gw = calloc(sizeof(struct ip_addr), 1);
+
+	struct netif *netifret = netif_add(netif, ipaddr, netmask, gw, NULL, &ethernetif_init, &ip_input);
+	if (netifret == NULL) {
+		free(netif);
+		free(ipaddr);
+		free(netmask);
+		free(gw);
+		return ERR_NOT_FOUND;
+	}
+
+	/* register for interrupt handlers */
+	register_int_handler(INT_NET, ethernet_int, netif);
+
+	netif_set_default(netif);
+
+	unmask_interrupt(INT_NET, NULL);
+
+	return NO_ERROR;
+}
+
+#endif // WITH_LWIP

bootable/bootloader/lk/platform/armemu/platform.c

@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <err.h>
+#include <debug.h>
+#include <platform.h>
+#include "platform_p.h"
+
+void platform_init_mmu_mappings(void)
+{
+}
+
+void platform_early_init(void)
+{
+	/* initialize the interrupt controller */
+	platform_init_interrupts();
+
+	/* initialize the timer block */
+	platform_init_timer();
+}
+
+void platform_init(void)
+{
+	platform_init_blkdev();
+	platform_init_display();
+}
+

bootable/bootloader/lk/platform/armemu/platform_p.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#ifndef __PLATFORM_P_H
+#define __PLATFORM_P_H
+
+void platform_init_interrupts(void);
+void platform_init_timer(void);
+void platform_init_blkdev(void);
+void platform_init_display(void);
+
+#endif
+

bootable/bootloader/lk/platform/armemu/rules.mk

@@ -0,0 +1,37 @@
+LOCAL_DIR := $(GET_LOCAL_DIR)
+
+ARCH := arm
+ARM_CPU := arm926ej-s
+CPU := generic
+
+# emulater doesn't support thumb properly
+ENABLE_THUMB := false
+
+INCLUDES += \
+	-I$(LOCAL_DIR)/include
+
+OBJS += \
+	$(LOCAL_DIR)/debug.o \
+	$(LOCAL_DIR)/interrupts.o \
+	$(LOCAL_DIR)/platform.o \
+	$(LOCAL_DIR)/timer.o \
+	$(LOCAL_DIR)/blkdev.o \
+	$(LOCAL_DIR)/display.o \
+
+
+#	$(LOCAL_DIR)/console.o \
+	$(LOCAL_DIR)/net.o \
+
+DEFINES += \
+	WITH_DEV_DISPLAY=1
+
+MODULES += \
+	lib/gfx
+
+
+MEMBASE := 0x0
+MEMSIZE := 0x400000	# 4MB
+
+LINKER_SCRIPT += \
+	$(BUILDDIR)/system-onesegment.ld
+

bootable/bootloader/lk/platform/armemu/timer.c

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2008 Travis Geiselbrecht
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <sys/types.h>
+#include <err.h>
+#include <kernel/thread.h>
+#include <platform.h>
+#include <platform/interrupts.h>
+#include <platform/timer.h>
+#include <platform/armemu.h>
+#include "platform_p.h"
+
+static platform_timer_callback t_callback;
+
+status_t platform_set_periodic_timer(platform_timer_callback callback, void *arg, time_t interval)
+{
+	enter_critical_section();
+
+	t_callback = callback;
+
+	*REG(PIT_CLEAR) = 1;
+	*REG(PIT_INTERVAL) = interval;
+	*REG(PIT_START_PERIODIC) = 1;
+
+	unmask_interrupt(INT_PIT);
+
+	exit_critical_section();
+
+	return NO_ERROR;
+}
+
+bigtime_t current_time_hires(void)
+{
+	bigtime_t time;
+	*REG(SYSINFO_TIME_LATCH) = 1;
+	time = *REG(SYSINFO_TIME_SECS) * 1000000ULL;
+	time += *REG(SYSINFO_TIME_USECS);
+
+	return time;
+}
+
+time_t current_time(void)
+{
+	time_t time;
+	*REG(SYSINFO_TIME_LATCH) = 1;
+	time = *REG(SYSINFO_TIME_SECS) * 1000;
+	time += *REG(SYSINFO_TIME_USECS) / 1000;
+
+	return time;
+}
+
+static enum handler_return platform_tick(void *arg)
+{
+	*REG(PIT_CLEAR_INT) = 1;
+	if (t_callback) {
+		return t_callback(arg, current_time());
+	} else {
+		return INT_NO_RESCHEDULE;
+	}
+}
+
+void platform_init_timer(void)
+{
+	register_int_handler(INT_PIT, &platform_tick, NULL);
+}
+