3 * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
4 * Marius Groeger <mgroeger@sysgo.de>
7 * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
10 * Texas Instruments, <www.ti.com>
11 * Kshitij Gupta <Kshitij@ti.com>
15 * Philippe Robin, <philippe.robin@arm.com>
17 * See file CREDITS for list of people who contributed to this
20 * This program is free software; you can redistribute it and/or
21 * modify it under the terms of the GNU General Public License as
22 * published by the Free Software Foundation; either version 2 of
23 * the License, or (at your option) any later version.
25 * This program is distributed in the hope that it will be useful,
26 * but WITHOUT ANY WARRANTY; without even the implied warranty of
27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 * GNU General Public License for more details.
30 * You should have received a copy of the GNU General Public License
31 * along with this program; if not, write to the Free Software
32 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
38 void flash__init (void);
39 void ether__init (void);
40 void peripheral_power_enable (void);
42 #if defined(CONFIG_SHOW_BOOT_PROGRESS)
43 void show_boot_progress(int progress)
45 printf("Boot reached stage %d\n", progress);
49 #define COMP_MODE_ENABLE ((unsigned int)0x0000EAEF)
52 * Miscellaneous platform dependent initialisations
57 DECLARE_GLOBAL_DATA_PTR;
59 /* arch number of Integrator Board */
60 gd->bd->bi_arch_number = MACH_TYPE_CINTEGRATOR;
62 /* adress of boot parameters */
63 gd->bd->bi_boot_params = 0x00000100;
67 #ifdef CONFIG_CM_REMAP
68 extern void cm_remap(void);
69 cm_remap(); /* remaps writeable memory to 0x00000000 */
80 int misc_init_r (void)
82 setenv("verify", "n");
86 /******************************
89 ******************************/
90 void flash__init (void)
93 /*************************************************************
95 Description: take the Ethernet controller out of reset and wait
96 for the EEPROM load to complete.
97 *************************************************************/
98 void ether__init (void)
102 /******************************
105 ******************************/
108 DECLARE_GLOBAL_DATA_PTR;
110 gd->bd->bi_dram[0].start = PHYS_SDRAM_1;
111 gd->bd->bi_dram[0].size = PHYS_SDRAM_1_SIZE;
113 #ifdef CONFIG_CM_SPD_DETECT
115 extern void dram_query(void);
116 unsigned long cm_reg_sdram;
117 unsigned long sdram_shift;
119 dram_query(); /* Assembler accesses to CM registers */
120 /* Queries the SPD values */
122 /* Obtain the SDRAM size from the CM SDRAM register */
124 cm_reg_sdram = *(volatile ulong *)(CM_BASE + OS_SDRAM);
125 /* Register SDRAM size
127 * 0xXXXXXXbbb000bb 16 MB
128 * 0xXXXXXXbbb001bb 32 MB
129 * 0xXXXXXXbbb010bb 64 MB
130 * 0xXXXXXXbbb011bb 128 MB
131 * 0xXXXXXXbbb100bb 256 MB
134 sdram_shift = ((cm_reg_sdram & 0x0000001C)/4)%4;
135 gd->bd->bi_dram[0].size = 0x01000000 << sdram_shift;
138 #endif /* CM_SPD_DETECT */
143 /* The Integrator/CP timer1 is clocked at 1MHz
144 * can be divided by 16 or 256
145 * and can be set up as a 32-bit timer
147 /* U-Boot expects a 32 bit timer, running at CFG_HZ */
148 /* Keep total timer count to avoid losing decrements < div_timer */
149 static unsigned long long total_count = 0;
150 static unsigned long long lastdec; /* Timer reading at last call */
151 static unsigned long long div_clock = 1; /* Divisor applied to timer clock */
152 static unsigned long long div_timer = 1; /* Divisor to convert timer reading
153 * change to U-Boot ticks
155 /* CFG_HZ = CFG_HZ_CLOCK/(div_clock * div_timer) */
156 static ulong timestamp; /* U-Boot ticks since startup */
158 #define TIMER_LOAD_VAL ((ulong)0xFFFFFFFF)
159 #define READ_TIMER (*(volatile ulong *)(CFG_TIMERBASE+4))
161 /* all function return values in U-Boot ticks i.e. (1/CFG_HZ) sec
162 * - unless otherwise stated
165 /* starts up a counter
166 * - the Integrator/CP timer can be set up to issue an interrupt */
167 int interrupt_init (void)
169 /* Load timer with initial value */
170 *(volatile ulong *)(CFG_TIMERBASE + 0) = TIMER_LOAD_VAL;
176 * divider 1 00 == less rounding error
180 *(volatile ulong *)(CFG_TIMERBASE + 8) = 0x000000C2;
181 /* init the timestamp */
183 reset_timer_masked();
185 div_timer = (unsigned long long)(CFG_HZ_CLOCK / CFG_HZ);
186 div_timer /= div_clock;
192 * timer without interrupts
194 void reset_timer (void)
196 reset_timer_masked ();
199 ulong get_timer (ulong base_ticks)
201 return get_timer_masked () - base_ticks;
204 void set_timer (ulong ticks)
207 total_count = (unsigned long long)ticks * div_timer;
210 /* delay usec useconds */
211 void udelay (unsigned long usec)
215 /* Convert to U-Boot ticks */
219 tmp = get_timer_masked(); /* get current timestamp */
220 tmo += tmp; /* form target timestamp */
222 while (get_timer_masked () < tmo) {/* loop till event */
227 void reset_timer_masked (void)
229 /* capure current decrementer value */
230 lastdec = (unsigned long long)READ_TIMER;
231 /* start "advancing" time stamp from 0 */
235 /* converts the timer reading to U-Boot ticks */
236 /* the timestamp is the number of ticks since reset */
237 ulong get_timer_masked (void)
239 /* get current count */
240 unsigned long long now = (unsigned long long)READ_TIMER;
243 /* Must have wrapped */
244 total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
246 total_count += lastdec - now;
249 timestamp = (ulong)(total_count/div_timer);
254 /* waits specified delay value and resets timestamp */
255 void udelay_masked (unsigned long usec)
261 * This function is derived from PowerPC code (read timebase as long long).
262 * On ARM it just returns the timer value.
264 unsigned long long get_ticks(void)
266 return (unsigned long long)get_timer(0);
270 * Return the timebase clock frequency
271 * i.e. how often the timer decrements
273 ulong get_tbclk (void)
275 return (ulong)(((unsigned long long)CFG_HZ_CLOCK)/div_clock);