[U-Boot-Users] [PATCH 6/7] External application demo
Rafal Jaworowski
raj at semihalf.com
Wed Oct 3 12:07:37 CEST 2007
diff -upr --new-file --exclude=.git /src/u-boot/api_examples/crt0.S u-boot/api_examples/crt0.S
--- /src/u-boot/api_examples/crt0.S 1970-01-01 01:00:00.000000000 +0100
+++ u-boot/api_examples/crt0.S 2007-10-02 13:49:12.000000000 +0200
@@ -0,0 +1,49 @@
+/*
+ * (C) Copyright 2007 Semihalf
+ *
+ * Written by: Rafal Jaworowski <raj at semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#if defined(CONFIG_PPC)
+
+ .text
+
+ .globl _start
+_start:
+ b main
+
+
+ .globl syscall
+syscall:
+ lis %r11, syscall_ptr at ha
+ addi %r11, %r11, syscall_ptr at l
+ lwz %r11, 0(%r11)
+ mtctr %r11
+ bctr
+
+
+ .globl syscall_ptr
+syscall_ptr:
+ .long 0
+#else
+#error No support for this arch!
+#endif
diff -upr --new-file --exclude=.git /src/u-boot/api_examples/demo.c u-boot/api_examples/demo.c
--- /src/u-boot/api_examples/demo.c 1970-01-01 01:00:00.000000000 +0100
+++ u-boot/api_examples/demo.c 2007-10-02 16:53:51.000000000 +0200
@@ -0,0 +1,294 @@
+/*
+ * (C) Copyright 2007 Semihalf
+ *
+ * Written by: Rafal Jaworowski <raj at semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <common.h>
+#include <linux/types.h>
+#include <api_public.h>
+
+#define errf(fmt, args...) do { printf("ERROR @ %s(): ", __func__); printf(fmt, ##args); } while (0)
+
+
+/********************************************************
+ *
+ * consumer API
+ *
+ ********************************************************/
+
+/* console */
+int ub_getc(void);
+int ub_tstc(void);
+void ub_putc(char c);
+
+/* system */
+void ub_reset(void);
+struct sys_info * ub_get_sys_info(void);
+
+/* time */
+void ub_udelay(unsigned long);
+unsigned long ub_get_timer(unsigned long);
+
+/* env vars */
+const char * ub_env_enum(const char *);
+char * ub_env_get(const char *);
+void ub_env_set(const char *, char *);
+
+/* devices */
+int ub_dev_enum(void);
+int ub_dev_open(int);
+int ub_dev_close(int);
+int ub_dev_read(int, void *, lbasize_t, lbastart_t);
+int ub_dev_send(int, void *, int);
+int ub_dev_recv(int, void *, int);
+struct device_info * ub_dev_get(int);
+
+void test_dump_si(struct sys_info *);
+void test_dump_di(int);
+void test_dump_sig(struct api_signature *);
+int api_search_sig(struct api_signature **);
+
+extern void * syscall_ptr;
+
+char buf[2048];
+
+
+int main(int argc, char *argv[])
+{
+ int rv = 0;
+ int h, i, j;
+ int devs_no;
+ struct api_signature *sig = NULL;
+ ulong start, now;
+ struct device_info *di;
+
+ if (!api_search_sig(&sig))
+ return -1;
+
+ syscall_ptr = sig->syscall;
+ if (syscall_ptr == NULL)
+ return -2;
+
+ if (sig->version > API_SIG_VERSION)
+ return -3;
+
+ printf("API signature found @%x\n", sig);
+ test_dump_sig(sig);
+
+ printf("\n*** Consumer API test ***\n");
+ printf("syscall ptr 0x%08x@%08x\n", syscall_ptr, &syscall_ptr);
+
+ /* console activities */
+ ub_putc('B');
+
+ printf("*** Press any key to continue ***\n");
+ printf("got char 0x%x\n", ub_getc());
+
+ /* system info */
+ test_dump_si(ub_get_sys_info());
+
+ /* timing */
+#define WAIT_SECS 2
+
+ printf("\n*** Timing - wait a couple of secs ***\n");
+ start = ub_get_timer(0);
+ for (i = 0; i < WAIT_SECS; i++)
+ for (j = 0; j < 1000; j++)
+ ub_udelay(1000); /* wait 1 ms */
+
+ /* this is the number of milliseconds that passed from ub_get_timer(0) */
+ now = ub_get_timer(start);
+ printf("\ntime: now %lu\n\n", now);
+
+ /* enumerate devices */
+ printf("\n*** Enumerate devices ***\n");
+ devs_no = ub_dev_enum();
+
+ printf("Number of devices found: %d\n", devs_no);
+ if (devs_no == 0)
+ return -1;
+
+
+ printf("\n*** Show devices ***\n");
+ for (i = 0; i < devs_no; i++) {
+ test_dump_di(i);
+ printf("\n");
+ }
+
+ printf("\n*** Operations on devices ***\n");
+
+ /* test opening a device already opened */
+ h = 0;
+ if ((rv = ub_dev_open(h)) != 0) {
+ errf("open device %d error %d\n", h, rv);
+ return -1;
+ }
+ if ((rv = ub_dev_open(h)) != 0)
+ errf("open device %d error %d\n", h, rv);
+
+ ub_dev_close(h);
+
+ /* test storage */
+ printf("Trying storage devices...\n");
+ for (i = 0; i < devs_no; i++) {
+ di = ub_dev_get(i);
+
+ if (di->type & DEV_TYP_STOR)
+ break;
+
+ }
+ if (i == devs_no)
+ printf("No storage devices available\n");
+ else {
+ if ((rv = ub_dev_open(i)) != 0)
+ errf("open device %d error %d\n", i, rv);
+ else if ((rv = ub_dev_read(i, &buf, 200, 20)) != 0)
+ errf("could not read from device %d, error %d\n", i, rv);
+
+ ub_dev_close(i);
+ }
+
+ /* test networking */
+ printf("Trying network devices...\n");
+ for (i = 0; i < devs_no; i++) {
+ di = ub_dev_get(i);
+
+ if (di->type == DEV_TYP_NET)
+ break;
+
+ }
+ if (i == devs_no)
+ printf("No network devices available\n");
+ else {
+ if ((rv = ub_dev_open(i)) != 0)
+ errf("open device %d error %d\n", i, rv);
+ else if ((rv = ub_dev_send(i, &buf, 2048)) != 0)
+ errf("could not send to device %d, error %d\n", i, rv);
+
+ ub_dev_close(i);
+ }
+
+ if (ub_dev_close(h) != 0)
+ errf("could not close device %d\n", h);
+
+ printf("\n*** Env vars ***\n");
+
+ printf("ethact = %s\n", ub_env_get("ethact"));
+ printf("old fileaddr = %s\n", ub_env_get("fileaddr"));
+ ub_env_set("fileaddr", "deadbeef");
+ printf("new fileaddr = %s\n", ub_env_get("fileaddr"));
+
+ const char *env = NULL;
+
+ while ((env = ub_env_enum(env)) != NULL)
+ printf("%s = %s\n", env, ub_env_get(env));
+
+ /* reset */
+ ub_reset();
+ printf("\nHmm, reset returned...?!\n");
+
+ return rv;
+}
+
+
+void test_dump_sig(struct api_signature *sig)
+{
+ printf("signature:\n");
+ printf(" version\t= %d\n", sig->version);
+ printf(" checksum\t= 0x%08x\n", sig->checksum);
+ printf(" sc entry\t= 0x%08x\n", sig->syscall);
+}
+
+void test_dump_si(struct sys_info *si)
+{
+ int i;
+
+ printf("sys info:\n");
+ printf(" clkbus\t= 0x%08x\n", si->clk_bus);
+ printf(" clkcpu\t= 0x%08x\n", si->clk_cpu);
+ printf(" bar\t\t= 0x%08x\n", si->bar);
+
+ printf("---\n");
+ for (i = 0; i < si->mr_no; i++) {
+ if (si->mr[i].flags == 0)
+ break;
+
+ printf(" start\t= 0x%08lx\n", si->mr[i].start);
+ printf(" size\t= 0x%08lx\n", si->mr[i].size);
+
+ switch(si->mr[i].flags & 0x000F) {
+ case MR_ATTR_FLASH:
+ printf(" type FLASH\n");
+ break;
+ case MR_ATTR_DRAM:
+ printf(" type DRAM\n");
+ break;
+ case MR_ATTR_SRAM:
+ printf(" type SRAM\n");
+ break;
+ default:
+ printf(" type UNKNOWN\n");
+ }
+ printf("---\n");
+ }
+}
+
+static char * test_stor_typ(int type)
+{
+ if (type & DT_STOR_IDE)
+ return "IDE";
+
+ if (type & DT_STOR_SCSI)
+ return "SCSI";
+
+ if (type & DT_STOR_USB)
+ return "USB";
+
+ if (type & DT_STOR_MMC);
+ return "MMC";
+
+ return "Unknown";
+}
+
+void test_dump_di(int handle)
+{
+ int i;
+ struct device_info *di = ub_dev_get(handle);
+
+ printf("device info (%d):\n", handle);
+ printf(" cookie\t= 0x%08x\n", (uint32_t)di->cookie);
+ printf(" type\t\t= 0x%08x\n", di->type);
+
+ if (di->type == DEV_TYP_NET) {
+ printf(" hwaddr\t= ");
+ for (i = 0; i < 6; i++)
+ printf("%02x ", di->di_net.hwaddr[i]);
+
+ printf("\n");
+
+ } else if (di->type & DEV_TYP_STOR) {
+ printf(" type\t\t= %s\n", test_stor_typ(di->type));
+ printf(" blk size\t\t= %d\n", di->di_stor.block_size);
+ printf(" blk count\t\t= %d\n", di->di_stor.block_count);
+ }
+}
diff -upr --new-file --exclude=.git /src/u-boot/api_examples/glue.c u-boot/api_examples/glue.c
--- /src/u-boot/api_examples/glue.c 1970-01-01 01:00:00.000000000 +0100
+++ u-boot/api_examples/glue.c 2007-10-02 16:51:26.000000000 +0200
@@ -0,0 +1,460 @@
+/*
+ * (C) Copyright 2007 Semihalf
+ *
+ * Written by: Rafal Jaworowski <raj at semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ */
+
+#include <stdarg.h>
+#include <linux/types.h>
+#include <api_public.h>
+
+/*
+ * ub_ library calls are part of the application, not U-Boot code! They are
+ * front-end wrappers that are used by the consumer application: they prepare
+ * arguments for particular syscall and jump to the low level syscall()
+ */
+
+/* console */
+int ub_getc(void);
+int ub_tstc(void);
+void ub_putc(char c);
+void ub_puts(const char *s);
+
+/* system */
+void ub_reset(void);
+struct sys_info * ub_get_sys_info(void);
+
+/* time */
+void ub_udelay(unsigned long);
+unsigned long ub_get_timer(unsigned long);
+
+/* env vars */
+char * ub_env_get(const char *name);
+void ub_env_set(const char *name, char *value);
+const char * ub_env_enum(const char *last);
+
+/* devices */
+int ub_dev_enum(void);
+int ub_dev_open(int handle);
+int ub_dev_close(int handle);
+int ub_dev_read(int handle, void *buf,
+ lbasize_t len, lbastart_t start);
+int ub_dev_send(int handle, void *buf, int len);
+int ub_dev_recv(int handle, void *buf, int len);
+
+int api_search_sig(struct api_signature **sig);
+
+extern int syscall(int, int *, ...);
+
+/* helper utilities from lib_generic */
+extern ulong crc32(ulong, const unsigned char *, uint);
+extern int memcmp(const void * cs, const void * ct, size_t count);
+extern void * memset(void * s, char c, size_t len);
+extern void printf (const char *fmt, ...);
+extern size_t strlen(const char * s);
+extern int strncmp(const char * cs,const char * ct,size_t count);
+
+static int valid_sig(struct api_signature *sig)
+{
+ uint32_t checksum;
+ struct api_signature s;
+
+ if (sig == NULL)
+ return 0;
+ /*
+ * Clear the checksum field (in the local copy) so as to calculate the
+ * CRC with the same initial contents as at the time when the sig was
+ * produced
+ */
+ s = *sig;
+ s.checksum = 0;
+
+ checksum = crc32(0, (unsigned char *)&s, sizeof(struct api_signature));
+
+ if (checksum != sig->checksum)
+ return 0;
+
+ return 1;
+}
+
+#define API_SEARCH_START (255 * 1024 * 1024) /* start at 1MB below top RAM */
+//#define API_SEARCH_START 0
+#define API_SEARCH_END (256 * 1024 * 1024 - 1) /* ...and search to the end */
+
+/*
+ * Searches for the U-Boot API signature
+ *
+ * returns 1/0 depending on found/not found result
+ */
+int api_search_sig(struct api_signature **sig) {
+
+ unsigned char *sp;
+
+ if (sig == NULL)
+ return 0;
+
+ sp = (unsigned char *)API_SEARCH_START;
+
+ while ((sp + (int)API_SIG_MAGLEN) < (unsigned char *)API_SEARCH_END) {
+ if (!memcmp(sp, API_SIG_MAGIC, API_SIG_MAGLEN)) {
+ *sig = (struct api_signature *)sp;
+ if (valid_sig(*sig))
+ return 1;
+ }
+ sp += API_SIG_MAGLEN;
+ }
+
+ *sig = NULL;
+ return 0;
+}
+
+
+
+/****************************************
+ *
+ * console
+ *
+ ****************************************/
+
+int ub_getc(void)
+{
+ int c;
+
+ if (!syscall(API_GETC, NULL, (uint32_t)&c))
+ return -1;
+
+ return c;
+}
+
+int ub_tstc(void)
+{
+ int t;
+
+ if (!syscall(API_TSTC, NULL, (uint32_t)&t))
+ return -1;
+
+ return t;
+}
+
+void ub_putc(char c)
+{
+ syscall(API_PUTC, NULL, (uint32_t)&c);
+}
+
+void ub_puts(const char *s)
+{
+ syscall(API_PUTS, NULL, (uint32_t)s);
+}
+
+/****************************************
+ *
+ * system
+ *
+ ****************************************/
+
+void ub_reset(void)
+{
+ syscall(API_RESET, NULL);
+}
+
+#define MR_MAX 5
+static struct mem_region mr[MR_MAX];
+static struct sys_info si;
+
+struct sys_info * ub_get_sys_info(void)
+{
+ int err = 0;
+
+ memset(&si, 0, sizeof(struct sys_info));
+ si.mr = mr;
+ si.mr_no = MR_MAX;
+ memset(&mr, 0, sizeof(mr));
+
+ if (!syscall(API_GET_SYS_INFO, &err, (u_int32_t)&si))
+ return NULL;
+
+ return ((err) ? NULL : &si);
+}
+
+/****************************************
+ *
+ * timing
+ *
+ ****************************************/
+
+void ub_udelay(unsigned long usec)
+{
+ syscall(API_UDELAY, NULL, &usec);
+}
+
+unsigned long ub_get_timer(unsigned long base)
+{
+ unsigned long cur;
+
+ if (!syscall(API_GET_TIMER, NULL, &cur, &base))
+ return 0;
+
+ return cur;
+}
+
+
+/****************************************************************************
+ *
+ * devices
+ *
+ * Devices are identified by handles: numbers 0, 1, 2, ..., MAX_DEVS-1
+ *
+ ***************************************************************************/
+
+#define MAX_DEVS 6
+
+static struct device_info devices[MAX_DEVS];
+
+struct device_info * ub_dev_get(int i)
+{
+ return ((i < 0 || i >= MAX_DEVS) ? NULL : &devices[i]);
+}
+
+/*
+ * Enumerates the devices: fills out device_info elements in the devices[]
+ * array.
+ *
+ * returns: number of devices found
+ */
+int ub_dev_enum(void)
+{
+ struct device_info *di;
+ int n = 0;
+
+ memset(&devices, 0, sizeof(struct device_info) * MAX_DEVS);
+ di = &devices[0];
+
+ if (!syscall(API_DEV_ENUM, NULL, di))
+ return 0;
+
+ while (di->cookie != NULL) {
+
+ if (++n >= MAX_DEVS)
+ break;
+
+ /* take another device_info */
+ di++;
+
+ /* pass on the previous cookie */
+ di->cookie = devices[n - 1].cookie;
+
+ if (!syscall(API_DEV_ENUM, NULL, di))
+ return 0;
+ }
+
+ return n;
+}
+
+/*
+ * handle: 0-based id of the device
+ *
+ * returns: 0 when OK, err otherwise
+ */
+int ub_dev_open(int handle)
+{
+ struct device_info *di;
+ int err = 0;
+
+ if (handle < 0 || handle >= MAX_DEVS)
+ return API_EINVAL;
+
+ di = &devices[handle];
+
+ if (!syscall(API_DEV_OPEN, &err, di))
+ return -1;
+
+ return err;
+}
+
+int ub_dev_close(int handle)
+{
+ struct device_info *di;
+
+ if (handle < 0 || handle >= MAX_DEVS)
+ return API_EINVAL;
+
+ di = &devices[handle];
+ if (!syscall(API_DEV_CLOSE, NULL, di))
+ return -1;
+
+ return 0;
+}
+
+/*
+ *
+ * Validates device for read/write, it has to:
+ *
+ * - have sane handle
+ * - be opened
+ *
+ * returns: 0/1 accordingly
+ */
+static int dev_valid(int handle)
+{
+ if (handle < 0 || handle >= MAX_DEVS)
+ return 0;
+
+ if (devices[handle].state != DEV_STA_OPEN)
+ return 0;
+
+ return 1;
+}
+
+static int dev_stor_valid(int handle)
+{
+ if (!dev_valid(handle))
+ return 0;
+
+ if (!(devices[handle].type & DEV_TYP_STOR))
+ return 0;
+
+ return 1;
+}
+
+int ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start)
+{
+ struct device_info *di;
+ lbasize_t act_len;
+ int err = 0;
+
+ if (!dev_stor_valid(handle))
+ return API_ENODEV;
+
+ di = &devices[handle];
+ if (!syscall(API_DEV_READ, &err, di, buf, &len, &start, &act_len))
+ return -1;
+
+ if (err)
+ return err;
+
+ if (act_len != len)
+ return API_EIO;
+
+ return 0;
+}
+
+static int dev_net_valid(int handle)
+{
+ if (!dev_valid(handle))
+ return 0;
+
+ if (devices[handle].type != DEV_TYP_NET)
+ return 0;
+
+ return 1;
+}
+
+int ub_dev_recv(int handle, void *buf, int len)
+{
+ struct device_info *di;
+ int err = 0, act_len;
+
+ if (!dev_net_valid(handle))
+ return API_ENODEV;
+
+ di = &devices[handle];
+ if (!syscall(API_DEV_READ, &err, di, buf, &len, &act_len))
+ return -1;
+
+ if (err)
+ return -1;
+
+ return act_len;
+}
+
+int ub_dev_send(int handle, void *buf, int len)
+{
+ struct device_info *di;
+ int err = 0;
+
+ if (!dev_net_valid(handle))
+ return API_ENODEV;
+
+ di = &devices[handle];
+ if (!syscall(API_DEV_WRITE, &err, di, buf, &len))
+ return -1;
+
+ return err;
+}
+
+/****************************************
+ *
+ * env vars
+ *
+ ****************************************/
+
+char * ub_env_get(const char *name)
+{
+ char *value;
+
+ if (!syscall(API_ENV_GET, NULL, (uint32_t)name, (uint32_t)&value))
+ return NULL;
+
+ return value;
+}
+
+void ub_env_set(const char *name, char *value)
+{
+ syscall(API_ENV_SET, NULL, (uint32_t)name, (uint32_t)value);
+}
+
+
+static char env_name[256];
+
+const char * ub_env_enum(const char *last)
+{
+ const char *env, *str;
+ int i;
+
+ env = NULL;
+
+ /*
+ * It's OK to pass only the name piece as last (and not the whole
+ * 'name=val' string), since the API_ENUM_ENV call uses envmatch()
+ * internally, which handles such case
+ */
+ if (!syscall(API_ENV_ENUM, NULL, (uint32_t)last, (uint32_t)&env))
+ return NULL;
+
+ if (!env)
+ /* no more env. variables to enumerate */
+ return NULL;
+#if 0
+ if (last && strncmp(env, last, strlen(last)) == 0);
+ /* error, trying to enumerate non existing env. variable */
+ return NULL;
+#endif
+
+ /* next enumerated env var */
+ memset(env_name, 0, 256);
+ for (i = 0, str = env; *str != '=' && *str != '\0';)
+ env_name[i++] = *str++;
+
+ env_name[i] = '\0';
+
+ return env_name;
+}
diff -upr --new-file --exclude=.git /src/u-boot/api_examples/libgenwrap.c u-boot/api_examples/libgenwrap.c
--- /src/u-boot/api_examples/libgenwrap.c 1970-01-01 01:00:00.000000000 +0100
+++ u-boot/api_examples/libgenwrap.c 2007-10-02 13:50:04.000000000 +0200
@@ -0,0 +1,96 @@
+/*
+ * (C) Copyright 2007 Semihalf
+ *
+ * Written by: Rafal Jaworowski <raj at semihalf.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ *
+ * This is is a set of wrappers/stubs that allow to use certain routines from
+ * U-Boot's lib_generic in the standalone app. This way way we can re-use
+ * existing code e.g. operations on strings and similar.
+ *
+ */
+
+#include <stdarg.h>
+#include <linux/types.h>
+
+#include "api_public.h"
+
+extern void ub_putc(char c);
+extern void ub_puts(const char *s);
+extern void ub_reset(void);
+extern void ub_udelay(unsigned long);
+
+extern int vsprintf(char *buf, const char *fmt, va_list args);
+
+/*
+ * printf() and vprintf() are stolen from u-boot/common/console.c
+ */
+void printf (const char *fmt, ...)
+{
+ va_list args;
+ uint i;
+ char printbuffer[256];
+
+ va_start (args, fmt);
+
+ /* For this to work, printbuffer must be larger than
+ * anything we ever want to print.
+ */
+ i = vsprintf (printbuffer, fmt, args);
+ va_end (args);
+
+ /* Print the string */
+ ub_puts (printbuffer);
+}
+
+void vprintf (const char *fmt, va_list args)
+{
+ uint i;
+ char printbuffer[256];
+
+ /* For this to work, printbuffer must be larger than
+ * anything we ever want to print.
+ */
+ i = vsprintf (printbuffer, fmt, args);
+
+ /* Print the string */
+ ub_puts (printbuffer);
+}
+
+void putc (const char c)
+{
+ ub_putc(c);
+}
+
+void udelay(unsigned long usec)
+{
+ ub_udelay(usec);
+}
+
+void do_reset (void)
+{
+ ub_reset();
+}
+
+void *malloc(size_t len)
+{
+ return NULL;
+}
diff -upr --new-file --exclude=.git /src/u-boot/api_examples/Makefile u-boot/api_examples/Makefile
--- /src/u-boot/api_examples/Makefile 1970-01-01 01:00:00.000000000 +0100
+++ u-boot/api_examples/Makefile 2007-10-02 13:50:43.000000000 +0200
@@ -0,0 +1,103 @@
+#
+# (C) Copyright 2007 Semihalf
+#
+# See file CREDITS for list of people who contributed to this
+# project.
+#
+# 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 Foundatio; either version 2 of
+# the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+# MA 02111-1307 USA
+#
+
+ifeq ($(ARCH),ppc)
+LOAD_ADDR = 0x40000
+endif
+
+#ifeq ($(ARCH),arm)
+#LOAD_ADDR = 0xc100000
+#endif
+
+include $(TOPDIR)/config.mk
+
+ELF += demo
+BIN += demo.bin
+
+#CFLAGS += -v
+
+COBJS := $(ELF:=.o)
+SOBJS := crt0.o
+ifeq ($(ARCH),ppc)
+SOBJS += ppcstring.o
+endif
+
+LIB = $(obj)libglue.a
+LIBCOBJS= glue.o crc32.o ctype.o string.o vsprintf.o libgenwrap.o
+
+LIBOBJS = $(addprefix $(obj),$(SOBJS) $(LIBCOBJS))
+
+SRCS := $(COBJS:.o=.c) $(LIBCOBJS:.o=.c) $(SOBJS:.o=.S)
+OBJS := $(addprefix $(obj),$(COBJS))
+ELF := $(addprefix $(obj),$(ELF))
+BIN := $(addprefix $(obj),$(BIN))
+
+gcclibdir := $(shell dirname `$(CC) -print-libgcc-file-name`)
+
+CPPFLAGS += -I..
+
+all: $(obj).depend $(OBJS) $(LIB) $(BIN) $(ELF)
+
+#########################################################################
+$(LIB): $(obj).depend $(LIBOBJS)
+ $(AR) $(ARFLAGS) $@ $(LIBOBJS)
+
+$(ELF):
+$(obj)%: $(obj)%.o $(LIB)
+ $(LD) $(obj)crt0.o -Ttext $(LOAD_ADDR) \
+ -o $@ $< $(LIB) \
+ -L$(gcclibdir) -lgcc
+
+$(BIN):
+$(obj)%.bin: $(obj)%
+ $(OBJCOPY) -O binary $< $@ 2>/dev/null
+
+$(obj)crc32.c:
+ @rm -f $(obj)crc32.c
+ ln -s $(src)../lib_generic/crc32.c $(obj)crc32.c
+
+$(obj)ctype.c:
+ @rm -f $(obj)ctype.c
+ ln -s $(src)../lib_generic/ctype.c $(obj)ctype.c
+
+$(obj)string.c:
+ @rm -f $(obj)string.c
+ ln -s $(src)../lib_generic/string.c $(obj)string.c
+
+$(obj)vsprintf.c:
+ @rm -f $(obj)vsprintf.c
+ ln -s $(src)../lib_generic/vsprintf.c $(obj)vsprintf.c
+
+ifeq ($(ARCH),ppc)
+$(obj)ppcstring.S:
+ @rm -f $(obj)ppcstring.S
+ ln -s $(src)../lib_ppc/ppcstring.S $(obj)ppcstring.S
+endif
+
+#########################################################################
+
+# defines $(obj).depend target
+include $(SRCTREE)/rules.mk
+
+sinclude $(obj).depend
+
+#########################################################################
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