exports: rewrite jump table init

The current jump table init fails to initialize a bunch of exported
symbols (forceenv/do_reset/etc...).  Rather than fix just these few
missing pieces, rewrite the code to utilize the existing list of
exported symbols -- _exports.h.  Since every exported symbol has to
be listed in this header, it makes sense to use it so that we only
ever have one list that needs to be updated and things can't fall
out of sync again.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

common/exports.c

@@ -12,38 +12,34 @@ unsigned long get_version(void)
 	return XF_VERSION;
 }
 
-void jumptable_init (void)
-{
-	int i;
-
-	gd->jt = (void **) malloc (XF_MAX * sizeof (void *));
-	for (i = 0; i < XF_MAX; i++)
-		gd->jt[i] = (void *) dummy;
+/* Reuse _exports.h with a little trickery to avoid bitrot */
+#define EXPORT_FUNC(sym) gd->jt[XF_##sym] = (void *)sym;
 
-	gd->jt[XF_get_version] = (void *) get_version;
-	gd->jt[XF_malloc] = (void *) malloc;
-	gd->jt[XF_free] = (void *) free;
-	gd->jt[XF_getenv] = (void *) getenv;
-	gd->jt[XF_setenv] = (void *) setenv;
-	gd->jt[XF_get_timer] = (void *) get_timer;
-	gd->jt[XF_simple_strtoul] = (void *) simple_strtoul;
-	gd->jt[XF_udelay] = (void *) udelay;
-	gd->jt[XF_simple_strtol] = (void *) simple_strtol;
-	gd->jt[XF_strcmp] = (void *) strcmp;
-#if defined(CONFIG_I386) || defined(CONFIG_PPC)
-	gd->jt[XF_install_hdlr] = (void *) irq_install_handler;
-	gd->jt[XF_free_hdlr] = (void *) irq_free_handler;
-#endif	/* I386 || PPC */
-#if defined(CONFIG_CMD_I2C)
-	gd->jt[XF_i2c_write] = (void *) i2c_write;
-	gd->jt[XF_i2c_read] = (void *) i2c_read;
+#if !defined(CONFIG_I386) && !defined(CONFIG_PPC)
+# define install_hdlr      dummy
+# define free_hdlr         dummy
+#else /* kludge for non-standard function naming */
+# define install_hdlr      irq_install_handler
+# define free_hdlr         irq_free_handler
+#endif
+#ifndef CONFIG_CMD_I2C
+# define i2c_write         dummy
+# define i2c_read          dummy
 #endif
-#ifdef CONFIG_CMD_SPI
-	gd->jt[XF_spi_init] = (void *) spi_init;
-	gd->jt[XF_spi_setup_slave] = (void *) spi_setup_slave;
-	gd->jt[XF_spi_free_slave] = (void *) spi_free_slave;
-	gd->jt[XF_spi_claim_bus] = (void *) spi_claim_bus;
-	gd->jt[XF_spi_release_bus] = (void *) spi_release_bus;
-	gd->jt[XF_spi_xfer] = (void *) spi_xfer;
+#ifndef CONFIG_CMD_SPI
+# define spi_init          dummy
+# define spi_setup_slave   dummy
+# define spi_free_slave    dummy
+# define spi_claim_bus     dummy
+# define spi_release_bus   dummy
+# define spi_xfer          dummy
 #endif
+#ifndef CONFIG_HAS_UID
+# define forceenv          dummy
+#endif
+
+void jumptable_init(void)
+{
+	gd->jt = malloc(XF_MAX * sizeof(void *));
+#include <_exports.h>
 }