1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2004,2009-2011 Freescale Semiconductor, Inc.
5 * Srikanth Srinivasan (srikanth.srinivasan@freescale.com)
9 * cpu_init.c - low level cpu init
16 #include <asm/fsl_law.h>
17 #include <asm/fsl_serdes.h>
20 extern void srio_init(void);
22 DECLARE_GLOBAL_DATA_PTR;
25 * Breathe some life into the CPU...
27 * Set up the memory map
28 * initialize a bunch of registers
33 /* Pointer is writable since we allocated a register for it */
34 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
36 /* Clear initial global data */
37 memset ((void *) gd, 0, sizeof (gd_t));
45 init_early_memctl_regs();
47 #if defined(CONFIG_FSL_DMA)
51 /* enable the timebase bit in HID0 */
52 set_hid0(get_hid0() | 0x4000000);
54 /* enable EMCP, SYNCBE | ABE bits in HID1 */
55 set_hid1(get_hid1() | 0x80000C00);
59 * initialize higher level parts of CPU like timers
63 /* needs to be in ram since code uses global static vars */
66 #ifdef CONFIG_SYS_SRIO
70 #if defined(CONFIG_MP)
76 #ifdef CONFIG_ADDR_MAP
77 /* Initialize address mapping array */
78 void init_addr_map(void)
81 ppc_bat_t bat = DBAT0;
83 unsigned long upper, lower;
85 for (i = 0; i < CONFIG_SYS_NUM_ADDR_MAP; i++, bat++) {
86 if (read_bat(bat, &upper, &lower) != -1) {
87 if (!BATU_VALID(upper))
90 size = BATU_SIZE(upper);
91 addrmap_set_entry(BATU_VADDR(upper), BATL_PADDR(lower),
94 #ifdef CONFIG_HIGH_BATS
95 /* High bats are not contiguous with low BAT numbers */