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
|
/*
* arch/ppc/platforms/4xx/xilinx_ml403.c
*
* Xilinx ML403 evaluation board initialization
*
* Author: Grant Likely <grant.likely@secretlab.ca>
*
* 2005 (c) Secret Lab Technologies Ltd.
* 2002-2004 (c) MontaVista Software, Inc.
*
* This file is licensed under the terms of the GNU General Public License
* version 2. This program is licensed "as is" without any warranty of any
* kind, whether express or implied.
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/tty.h>
#include <linux/serial.h>
#include <linux/serial_core.h>
#include <linux/serial_8250.h>
#include <linux/serialP.h>
#include <asm/io.h>
#include <asm/machdep.h>
#include <asm/ppc_sys.h>
#include <syslib/gen550.h>
#include <platforms/4xx/xparameters/xparameters.h>
/*
* As an overview of how the following functions (platform_init,
* ml403_map_io, ml403_setup_arch and ml403_init_IRQ) fit into the
* kernel startup procedure, here's a call tree:
*
* start_here arch/ppc/kernel/head_4xx.S
* early_init arch/ppc/kernel/setup.c
* machine_init arch/ppc/kernel/setup.c
* platform_init this file
* ppc4xx_init arch/ppc/syslib/ppc4xx_setup.c
* parse_bootinfo
* find_bootinfo
* "setup some default ppc_md pointers"
* MMU_init arch/ppc/mm/init.c
* *ppc_md.setup_io_mappings == ml403_map_io this file
* ppc4xx_map_io arch/ppc/syslib/ppc4xx_setup.c
* start_kernel init/main.c
* setup_arch arch/ppc/kernel/setup.c
* #if defined(CONFIG_KGDB)
* *ppc_md.kgdb_map_scc() == gen550_kgdb_map_scc
* #endif
* *ppc_md.setup_arch == ml403_setup_arch this file
* ppc4xx_setup_arch arch/ppc/syslib/ppc4xx_setup.c
* ppc4xx_find_bridges arch/ppc/syslib/ppc405_pci.c
* init_IRQ arch/ppc/kernel/irq.c
* *ppc_md.init_IRQ == ml403_init_IRQ this file
* ppc4xx_init_IRQ arch/ppc/syslib/ppc4xx_setup.c
* ppc4xx_pic_init arch/ppc/syslib/xilinx_pic.c
*/
/* Board specifications structures */
struct ppc_sys_spec *cur_ppc_sys_spec;
struct ppc_sys_spec ppc_sys_specs[] = {
{
/* Only one entry, always assume the same design */
.ppc_sys_name = "Xilinx ML403 Reference Design",
.mask = 0x00000000,
.value = 0x00000000,
.num_devices = 1,
.device_list = (enum ppc_sys_devices[])
{
VIRTEX_UART,
},
},
};
const char* virtex_machine_name = "ML403 Reference Design";
#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
static volatile unsigned *powerdown_base =
(volatile unsigned *) XPAR_POWER_0_POWERDOWN_BASEADDR;
static void
xilinx_power_off(void)
{
local_irq_disable();
out_be32(powerdown_base, XPAR_POWER_0_POWERDOWN_VALUE);
while (1) ;
}
#endif
void __init
ml403_map_io(void)
{
ppc4xx_map_io();
#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
powerdown_base = ioremap((unsigned long) powerdown_base,
XPAR_POWER_0_POWERDOWN_HIGHADDR -
XPAR_POWER_0_POWERDOWN_BASEADDR + 1);
#endif
}
/* Early serial support functions */
static void __init
ml403_early_serial_init(int num, struct plat_serial8250_port *pdata)
{
#if defined(CONFIG_SERIAL_TEXT_DEBUG) || defined(CONFIG_KGDB)
struct uart_port serial_req;
memset(&serial_req, 0, sizeof(serial_req));
serial_req.mapbase = pdata->mapbase;
serial_req.membase = pdata->membase;
serial_req.irq = pdata->irq;
serial_req.uartclk = pdata->uartclk;
serial_req.regshift = pdata->regshift;
serial_req.iotype = pdata->iotype;
serial_req.flags = pdata->flags;
gen550_init(num, &serial_req);
#endif
}
void __init
ml403_early_serial_map(void)
{
#ifdef CONFIG_SERIAL_8250
struct plat_serial8250_port *pdata;
int i = 0;
pdata = (struct plat_serial8250_port *) ppc_sys_get_pdata(VIRTEX_UART);
while(pdata && pdata->flags)
{
pdata->membase = ioremap(pdata->mapbase, 0x100);
ml403_early_serial_init(i, pdata);
pdata++;
i++;
}
#endif /* CONFIG_SERIAL_8250 */
}
void __init
ml403_setup_arch(void)
{
ml403_early_serial_map();
ppc4xx_setup_arch(); /* calls ppc4xx_find_bridges() */
/* Identify the system */
printk(KERN_INFO "Xilinx ML403 Reference System (Virtex-4 FX)\n");
}
/* Called after board_setup_irq from ppc4xx_init_IRQ(). */
void __init
ml403_init_irq(void)
{
ppc4xx_init_IRQ();
}
void __init
platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7)
{
ppc4xx_init(r3, r4, r5, r6, r7);
identify_ppc_sys_by_id(mfspr(SPRN_PVR));
ppc_md.setup_arch = ml403_setup_arch;
ppc_md.setup_io_mappings = ml403_map_io;
ppc_md.init_IRQ = ml403_init_irq;
#if defined(XPAR_POWER_0_POWERDOWN_BASEADDR)
ppc_md.power_off = xilinx_power_off;
#endif
#ifdef CONFIG_KGDB
ppc_md.early_serial_map = ml403_early_serial_map;
#endif
}
|
