Das U-Boot: Universal Boot Loader

diff --git a/include/74xx_7xx.h b/include/74xx_7xx.h
new file mode 100644 (file)
index 0000000..193ba6c
--- /dev/null
+++ b/include/74xx_7xx.h
@@ -0,0 +1,161 @@
+/*
+ * (C) Copyright 2001
+ * Josh Huber, Mission Critical Linux, Inc. <huber@mclx.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
+ */
+
+/*
+ * 74xx_7xx.h
+ *
+ * 74xx/7xx specific definitions
+ */
+
+#ifndef __MPC74XX_H__
+#define __MPC74XX_H__
+
+/*----------------------------------------------------------------
+ * Exception offsets (PowerPC standard)
+ */
+#define EXC_OFF_SYS_RESET        0x0100      /* default system reset offset */
+
+/*----------------------------------------------------------------
+ * l2cr values
+ */
+#define l2cr            1017
+
+#define L2CR_L2E         0x80000000 /* bit 0 - enable */
+#define L2CR_L2PE        0x40000000 /* bit 1 - data parity */
+#define L2CR_L2SIZ_2M    0x00000000 /* bits 2-3 - 2MB, MPC7400 only! */
+#define L2CR_L2SIZ_1M    0x30000000 /* ... 1MB */
+#define L2CR_L2SIZ_HM    0x20000000 /* ... 512K */
+#define L2CR_L2SIZ_QM    0x10000000 /* ... 256k */
+#define L2CR_L2CLK_1     0x02000000 /* bits 4-6 clock ratio div 1 */
+#define L2CR_L2CLK_1_5   0x04000000 /* bits 4-6 clock ratio div 1.5 */
+#define L2CR_L2CLK_2     0x08000000 /* bits 4-6 clock ratio div 2 */
+#define L2CR_L2CLK_2_5   0x0a000000 /* bits 4-6 clock ratio div 2.5 */
+#define L2CR_L2CLK_3     0x0c000000 /* bits 4-6 clock ratio div 3 */
+#define L2CR_L2CLK_3_5   0x06000000 /* bits 4-6 clock ratio div 3.5 */
+#define L2CR_L2CLK_4     0x0e000000 /* bits 4-6 clock ratio div 4 */
+#define L2CR_L2RAM_BURST 0x01000000 /* bits 7-8 - burst SRAM */
+#define L2CR_DO          0x00400000 /* bit 9 - enable caching of instr. in L2 */
+#define L2CR_L2I         0x00200000 /* bit 10 - global invalidate bit */
+#define L2CR_L2CTL       0x00100000 /* bit 11 - l2 ram control */
+#define L2CR_L2WT        0x00080000 /* bit 12 - l2 write-through */
+#define L2CR_TS          0x00040000 /* bit 13 - test support on */
+#define L2CR_TS_OFF      -L2CR_TS   /* bit 13 - test support off */
+#define L2CR_L2OH_5      0x00000000 /* bits 14-15 - output hold time = short */
+#define L2CR_L2OH_1      0x00010000 /* bits 14-15 - output hold time = medium */
+#define L2CR_L2OH_INV    0x00020000 /* bits 14-15 - output hold time = long */
+#define L2CR_L2IP        0x00000001 /* global invalidate in progress */
+
+/*----------------------------------------------------------------
+ * BAT settings.  Look in config_<BOARD>.h for the actual setup
+ */
+
+#define BATU_BL_128K            0x00000000
+#define BATU_BL_256K            0x00000004
+#define BATU_BL_512K            0x0000000c
+#define BATU_BL_1M              0x0000001c
+#define BATU_BL_2M              0x0000003c
+#define BATU_BL_4M              0x0000007c
+#define BATU_BL_8M              0x000000fc
+#define BATU_BL_16M             0x000001fc
+#define BATU_BL_32M             0x000003fc
+#define BATU_BL_64M             0x000007fc
+#define BATU_BL_128M            0x00000ffc
+#define BATU_BL_256M            0x00001ffc
+
+#define BATU_VS                 0x00000002
+#define BATU_VP                 0x00000001
+#define BATU_INVALID            0x00000000
+
+#define BATL_WRITETHROUGH       0x00000040
+#define BATL_CACHEINHIBIT       0x00000020
+#define BATL_MEMCOHERENCE      0x00000010
+#define BATL_GUARDEDSTORAGE     0x00000008
+#define BATL_NO_ACCESS         0x00000000
+
+#define BATL_PP_MSK            0x00000003
+#define BATL_PP_00             0x00000000 /* No access */
+#define BATL_PP_01             0x00000001 /* Read-only */
+#define BATL_PP_10             0x00000002 /* Read-write */
+#define BATL_PP_11             0x00000003
+
+#define BATL_PP_NO_ACCESS      BATL_PP_00
+#define BATL_PP_RO             BATL_PP_01
+#define BATL_PP_RW             BATL_PP_10
+
+#ifndef __ASSEMBLY__
+/* cpu ids we detect */
+typedef enum __cpu_t {
+       CPU_740, CPU_750,
+       CPU_740P, CPU_750P,
+       CPU_745, CPU_755,
+       CPU_750CX,
+       CPU_7400,
+       CPU_7410,
+       CPU_7450,
+       CPU_UNKNOWN} cpu_t;
+
+extern cpu_t get_cpu_type(void);
+
+#define l1icache_enable        icache_enable
+
+void l2cache_enable(void);
+void l1dcache_enable(void);
+
+static __inline__ unsigned long get_msr (void)
+{
+       unsigned long msr;
+       asm volatile("mfmsr %0" : "=r" (msr) :);
+       return msr;
+}
+
+static __inline__ void set_msr (unsigned long msr)
+{
+       asm volatile("mtmsr %0" : : "r" (msr));
+}
+
+static __inline__ unsigned long get_hid0 (void)
+{
+       unsigned long hid0;
+       asm volatile("mfspr %0, 1008" : "=r" (hid0) :);
+       return hid0;
+}
+
+static __inline__ unsigned long get_hid1 (void)
+{
+       unsigned long hid1;
+       asm volatile("mfspr %0, 1009" : "=r" (hid1) :);
+       return hid1;
+}
+
+static __inline__ void set_hid0 (unsigned long hid0)
+{
+       asm volatile("mtspr 1008, %0" : : "r" (hid0));
+}
+
+static __inline__ void set_hid1 (unsigned long hid1)
+{
+       asm volatile("mtspr 1009, %0" : : "r" (hid1));
+}
+
+#endif /* __ASSEMBLY__ */
+#endif  /* __MPC74XX_H__ */