1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2004-2008 Freescale Semiconductor, Inc.
7 #include <asm-offsets.h>
8 #include <clock_legacy.h>
12 #include "lblaw/lblaw.h"
13 #include "elbc/elbc.h"
15 DECLARE_GLOBAL_DATA_PTR;
18 * Breathe some life into the CPU...
20 * Set up the memory map,
21 * initialize a bunch of registers,
22 * initialize the UPM's
24 void cpu_init_f (volatile immap_t * im)
26 /* Pointer is writable since we allocated a register for it */
27 gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
29 /* global data region was cleared in start.S */
31 /* system performance tweaking */
33 #ifndef CONFIG_ACR_PIPE_DEP_UNSET
34 /* Arbiter pipeline depth */
35 im->arbiter.acr = (im->arbiter.acr & ~ACR_PIPE_DEP) |
39 #ifndef CONFIG_ACR_RPTCNT_UNSET
40 /* Arbiter repeat count */
41 im->arbiter.acr = (im->arbiter.acr & ~(ACR_RPTCNT)) |
45 #ifdef CONFIG_SYS_SPCR_OPT
46 /* Optimize transactions between CSB and other devices */
47 im->sysconf.spcr = (im->sysconf.spcr & ~SPCR_OPT) |
48 (CONFIG_SYS_SPCR_OPT << SPCR_OPT_SHIFT);
51 /* Enable Time Base & Decrementer (so we will have udelay()) */
52 im->sysconf.spcr |= SPCR_TBEN;
54 /* DDR control driver register */
55 #ifdef CONFIG_SYS_DDRCDR
56 im->sysconf.ddrcdr = CONFIG_SYS_DDRCDR;
58 /* Output buffer impedance register */
59 #ifdef CONFIG_SYS_OBIR
60 im->sysconf.obir = CONFIG_SYS_OBIR;
67 /* Map banks 0 and 1 to the FLASH banks 0 and 1 at preliminary
68 * addresses - these have to be modified later when FLASH size
72 #if defined(CONFIG_SYS_NAND_BR_PRELIM) \
73 && defined(CONFIG_SYS_NAND_OR_PRELIM) \
74 && defined(CONFIG_SYS_NAND_LBLAWBAR_PRELIM) \
75 && defined(CONFIG_SYS_NAND_LBLAWAR_PRELIM)
76 set_lbc_br(0, CONFIG_SYS_NAND_BR_PRELIM);
77 set_lbc_or(0, CONFIG_SYS_NAND_OR_PRELIM);
78 im->sysconf.lblaw[0].bar = CONFIG_SYS_NAND_LBLAWBAR_PRELIM;
79 im->sysconf.lblaw[0].ar = CONFIG_SYS_NAND_LBLAWAR_PRELIM;
81 #error CONFIG_SYS_NAND_BR_PRELIM, CONFIG_SYS_NAND_OR_PRELIM, CONFIG_SYS_NAND_LBLAWBAR_PRELIM & CONFIG_SYS_NAND_LBLAWAR_PRELIM must be defined
86 * Get timebase clock frequency (like cpu_clk in Hz)
88 unsigned long get_tbclk(void)
90 return (gd->bus_clk + 3L) / 4L;
93 void puts(const char *str)
99 ulong get_bus_freq(ulong dummy)
101 volatile immap_t *im = (immap_t *) CONFIG_SYS_IMMR;
102 u8 spmf = (im->clk.spmr & SPMR_SPMF) >> SPMR_SPMF_SHIFT;
104 return CONFIG_SYS_CLK_FREQ * spmf;