1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/*
* arch/v850/kernel/anna.c -- Anna V850E2 evaluation chip/board
*
* Copyright (C) 2002,03 NEC Electronics Corporation
* Copyright (C) 2002,03 Miles Bader <miles@gnu.org>
*
* This file is subject to the terms and conditions of the GNU General
* Public License. See the file COPYING in the main directory of this
* archive for more details.
*
* Written by Miles Bader <miles@gnu.org>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/major.h>
#include <linux/irq.h>
#include <asm/machdep.h>
#include <asm/atomic.h>
#include <asm/page.h>
#include <asm/v850e_timer_d.h>
#include <asm/v850e_uart.h>
#include "mach.h"
/* SRAM and SDRAM are vaguely contiguous (with a big hole in between; see
mach_reserve_bootmem for details); use both as one big area. */
#define RAM_START SRAM_ADDR
#define RAM_END (SDRAM_ADDR + SDRAM_SIZE)
/* The bits of this port are connected to an 8-LED bar-graph. */
#define LEDS_PORT 0
static void anna_led_tick (void);
void __init mach_early_init (void)
{
ANNA_ILBEN = 0;
V850E2_CSC(0) = 0x402F;
V850E2_CSC(1) = 0x4000;
V850E2_BPC = 0;
V850E2_BSC = 0xAAAA;
V850E2_BEC = 0;
#if 0
V850E2_BHC = 0xFFFF; /* icache all memory, dcache all */
#else
V850E2_BHC = 0; /* cache no memory */
#endif
V850E2_BCT(0) = 0xB088;
V850E2_BCT(1) = 0x0008;
V850E2_DWC(0) = 0x0027;
V850E2_DWC(1) = 0;
V850E2_BCC = 0x0006;
V850E2_ASC = 0;
V850E2_LBS = 0x0089;
V850E2_SCR(3) = 0x21A9;
V850E2_RFS(3) = 0x8121;
v850e_intc_disable_irqs ();
}
void __init mach_setup (char **cmdline)
{
ANNA_PORT_PM (LEDS_PORT) = 0; /* Make all LED pins output pins. */
mach_tick = anna_led_tick;
}
void __init mach_get_physical_ram (unsigned long *ram_start,
unsigned long *ram_len)
{
*ram_start = RAM_START;
*ram_len = RAM_END - RAM_START;
}
void __init mach_reserve_bootmem ()
{
/* The space between SRAM and SDRAM is filled with duplicate
images of SRAM. Prevent the kernel from using them. */
reserve_bootmem (SRAM_ADDR + SRAM_SIZE,
SDRAM_ADDR - (SRAM_ADDR + SRAM_SIZE));
}
void mach_gettimeofday (struct timespec *tv)
{
tv->tv_sec = 0;
tv->tv_nsec = 0;
}
void __init mach_sched_init (struct irqaction *timer_action)
{
/* Start hardware timer. */
v850e_timer_d_configure (0, HZ);
/* Install timer interrupt handler. */
setup_irq (IRQ_INTCMD(0), timer_action);
}
static struct v850e_intc_irq_init irq_inits[] = {
{ "IRQ", 0, NUM_MACH_IRQS, 1, 7 },
{ "PIN", IRQ_INTP(0), IRQ_INTP_NUM, 1, 4 },
{ "CCC", IRQ_INTCCC(0), IRQ_INTCCC_NUM, 1, 5 },
{ "CMD", IRQ_INTCMD(0), IRQ_INTCMD_NUM, 1, 5 },
{ "DMA", IRQ_INTDMA(0), IRQ_INTDMA_NUM, 1, 2 },
{ "DMXER", IRQ_INTDMXER,1, 1, 2 },
{ "SRE", IRQ_INTSRE(0), IRQ_INTSRE_NUM, 3, 3 },
{ "SR", IRQ_INTSR(0), IRQ_INTSR_NUM, 3, 4 },
{ "ST", IRQ_INTST(0), IRQ_INTST_NUM, 3, 5 },
{ 0 }
};
#define NUM_IRQ_INITS (ARRAY_SIZE(irq_inits) - 1)
static struct hw_interrupt_type hw_itypes[NUM_IRQ_INITS];
void __init mach_init_irqs (void)
{
v850e_intc_init_irq_types (irq_inits, hw_itypes);
}
void machine_restart (char *__unused)
{
#ifdef CONFIG_RESET_GUARD
disable_reset_guard ();
#endif
asm ("jmp r0"); /* Jump to the reset vector. */
}
void machine_halt (void)
{
#ifdef CONFIG_RESET_GUARD
disable_reset_guard ();
#endif
local_irq_disable (); /* Ignore all interrupts. */
ANNA_PORT_IO(LEDS_PORT) = 0xAA; /* Note that we halted. */
for (;;)
asm ("halt; nop; nop; nop; nop; nop");
}
void machine_power_off (void)
{
machine_halt ();
}
/* Called before configuring an on-chip UART. */
void anna_uart_pre_configure (unsigned chan, unsigned cflags, unsigned baud)
{
/* The Anna connects some general-purpose I/O pins on the CPU to
the RTS/CTS lines of UART 1's serial connection. I/O pins P07
and P37 are RTS and CTS respectively. */
if (chan == 1) {
ANNA_PORT_PM(0) &= ~0x80; /* P07 in output mode */
ANNA_PORT_PM(3) |= 0x80; /* P37 in input mode */
}
}
/* Minimum and maximum bounds for the moving upper LED boundary in the
clock tick display. We can't use the last bit because it's used for
UART0's CTS output. */
#define MIN_MAX_POS 0
#define MAX_MAX_POS 6
/* There are MAX_MAX_POS^2 - MIN_MAX_POS^2 cycles in the animation, so if
we pick 6 and 0 as above, we get 49 cycles, which is when divided into
the standard 100 value for HZ, gives us an almost 1s total time. */
#define TICKS_PER_FRAME \
(HZ / (MAX_MAX_POS * MAX_MAX_POS - MIN_MAX_POS * MIN_MAX_POS))
static void anna_led_tick ()
{
static unsigned counter = 0;
if (++counter == TICKS_PER_FRAME) {
static int pos = 0, max_pos = MAX_MAX_POS, dir = 1;
if (dir > 0 && pos == max_pos) {
dir = -1;
if (max_pos == MIN_MAX_POS)
max_pos = MAX_MAX_POS;
else
max_pos--;
} else {
if (dir < 0 && pos == 0)
dir = 1;
if (pos + dir <= max_pos) {
/* Each bit of port 0 has a LED. */
clear_bit (pos, &ANNA_PORT_IO(LEDS_PORT));
pos += dir;
set_bit (pos, &ANNA_PORT_IO(LEDS_PORT));
}
}
counter = 0;
}
}
|
