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-rw-r--r--arch/cris/boot/compressed/Makefile38
-rw-r--r--arch/cris/boot/compressed/README24
-rw-r--r--arch/cris/boot/compressed/decompress_v10.lds30
-rw-r--r--arch/cris/boot/compressed/decompress_v32.lds30
-rw-r--r--arch/cris/boot/compressed/head_v10.S126
-rw-r--r--arch/cris/boot/compressed/head_v32.S145
-rw-r--r--arch/cris/boot/compressed/misc.c391
7 files changed, 784 insertions, 0 deletions
diff --git a/arch/cris/boot/compressed/Makefile b/arch/cris/boot/compressed/Makefile
new file mode 100644
index 000000000000..8fe9338c1775
--- /dev/null
+++ b/arch/cris/boot/compressed/Makefile
@@ -0,0 +1,38 @@
1#
2# arch/cris/boot/compressed/Makefile
3#
4
5asflags-y += $(LINUXINCLUDE)
6ccflags-y += -O2 $(LINUXINCLUDE)
7
8# asflags-$(CONFIG_ETRAX_ARCH_V32) += -I$(srctree)/include/asm/mach \
9# -I$(srctree)/include/asm/arch
10# ccflags-$(CONFIG_ETRAX_ARCH_V32) += -O2 -I$(srctree)/include/asm/mach
11# -I$(srctree)/include/asm/arch
12
13arch-$(CONFIG_ETRAX_ARCH_V10) = v10
14arch-$(CONFIG_ETRAX_ARCH_V32) = v32
15
16ldflags-y += -T $(srctree)/$(src)/decompress_$(arch-y).lds
17
18OBJECTS-$(CONFIG_ETRAX_ARCH_V32) = $(obj)/head_v32.o
19OBJECTS-$(CONFIG_ETRAX_ARCH_V10) = $(obj)/head_v10.o
20OBJECTS= $(OBJECTS-y) $(obj)/misc.o
21OBJCOPYFLAGS = -O binary --remove-section=.bss
22
23quiet_cmd_image = BUILD $@
24cmd_image = cat $(obj)/decompress.bin $(obj)/piggy.gz > $@
25
26targets := vmlinux piggy.gz decompress.o decompress.bin
27
28$(obj)/decompress.o: $(OBJECTS) FORCE
29 $(call if_changed,ld)
30
31$(obj)/decompress.bin: $(obj)/decompress.o FORCE
32 $(call if_changed,objcopy)
33
34$(obj)/vmlinux: $(obj)/piggy.gz $(obj)/decompress.bin FORCE
35 $(call if_changed,image)
36
37$(obj)/piggy.gz: $(obj)/../Image FORCE
38 $(call if_changed,gzip)
diff --git a/arch/cris/boot/compressed/README b/arch/cris/boot/compressed/README
new file mode 100644
index 000000000000..182c5d75784b
--- /dev/null
+++ b/arch/cris/boot/compressed/README
@@ -0,0 +1,24 @@
1Creation of the self-extracting compressed kernel image (vmlinuz)
2-----------------------------------------------------------------
3
4This can be slightly confusing because it's a process with many steps.
5
6The kernel object built by the arch/etrax100/Makefile, vmlinux, is split
7by that makefile into text and data binary files, vmlinux.text and
8vmlinux.data.
9
10Those files together with a ROM filesystem can be catted together and
11burned into a flash or executed directly at the DRAM origin.
12
13They can also be catted together and compressed with gzip, which is what
14happens in this makefile. Together they make up piggy.img.
15
16The decompressor is built into the file decompress.o. It is turned into
17the binary file decompress.bin, which is catted together with piggy.img
18into the file vmlinuz. It can be executed in an arbitrary place in flash.
19
20Be careful - it assumes some things about free locations in DRAM. It
21assumes the DRAM starts at 0x40000000 and that it is at least 8 MB,
22so it puts its code at 0x40700000, and initial stack at 0x40800000.
23
24-Bjorn
diff --git a/arch/cris/boot/compressed/decompress_v10.lds b/arch/cris/boot/compressed/decompress_v10.lds
new file mode 100644
index 000000000000..e80f4594d543
--- /dev/null
+++ b/arch/cris/boot/compressed/decompress_v10.lds
@@ -0,0 +1,30 @@
1/* OUTPUT_FORMAT(elf32-us-cris) */
2OUTPUT_FORMAT(elf32-cris)
3
4MEMORY
5 {
6 dram : ORIGIN = 0x40700000,
7 LENGTH = 0x00100000
8 }
9
10SECTIONS
11{
12 .text :
13 {
14 _stext = . ;
15 *(.text)
16 *(.rodata)
17 *(.rodata.*)
18 _etext = . ;
19 } > dram
20 .data :
21 {
22 *(.data)
23 _edata = . ;
24 } > dram
25 .bss :
26 {
27 *(.bss)
28 _end = ALIGN( 0x10 ) ;
29 } > dram
30}
diff --git a/arch/cris/boot/compressed/decompress_v32.lds b/arch/cris/boot/compressed/decompress_v32.lds
new file mode 100644
index 000000000000..3c837feca3ac
--- /dev/null
+++ b/arch/cris/boot/compressed/decompress_v32.lds
@@ -0,0 +1,30 @@
1/*#OUTPUT_FORMAT(elf32-us-cris) */
2OUTPUT_ARCH (crisv32)
3
4MEMORY
5 {
6 dram : ORIGIN = 0x40700000,
7 LENGTH = 0x00100000
8 }
9
10SECTIONS
11{
12 .text :
13 {
14 _stext = . ;
15 *(.text)
16 *(.rodata)
17 *(.rodata.*)
18 _etext = . ;
19 } > dram
20 .data :
21 {
22 *(.data)
23 _edata = . ;
24 } > dram
25 .bss :
26 {
27 *(.bss)
28 _end = ALIGN( 0x10 ) ;
29 } > dram
30}
diff --git a/arch/cris/boot/compressed/head_v10.S b/arch/cris/boot/compressed/head_v10.S
new file mode 100644
index 000000000000..9edb8ade7e1f
--- /dev/null
+++ b/arch/cris/boot/compressed/head_v10.S
@@ -0,0 +1,126 @@
1/*
2 * arch/cris/boot/compressed/head.S
3 *
4 * Copyright (C) 1999, 2001 Axis Communications AB
5 *
6 * Code that sets up the DRAM registers, calls the
7 * decompressor to unpack the piggybacked kernel, and jumps.
8 *
9 */
10
11#define ASSEMBLER_MACROS_ONLY
12#include <arch/sv_addr_ag.h>
13
14#define RAM_INIT_MAGIC 0x56902387
15#define COMMAND_LINE_MAGIC 0x87109563
16
17 ;; Exported symbols
18
19 .globl input_data
20
21
22 .text
23
24 nop
25 di
26
27;; We need to initialze DRAM registers before we start using the DRAM
28
29 cmp.d RAM_INIT_MAGIC, $r8 ; Already initialized?
30 beq dram_init_finished
31 nop
32
33#include "../../arch-v10/lib/dram_init.S"
34
35dram_init_finished:
36
37 ;; Initiate the PA and PB ports
38
39 move.b CONFIG_ETRAX_DEF_R_PORT_PA_DATA, $r0
40 move.b $r0, [R_PORT_PA_DATA]
41
42 move.b CONFIG_ETRAX_DEF_R_PORT_PA_DIR, $r0
43 move.b $r0, [R_PORT_PA_DIR]
44
45 move.b CONFIG_ETRAX_DEF_R_PORT_PB_DATA, $r0
46 move.b $r0, [R_PORT_PB_DATA]
47
48 move.b CONFIG_ETRAX_DEF_R_PORT_PB_DIR, $r0
49 move.b $r0, [R_PORT_PB_DIR]
50
51 ;; Setup the stack to a suitably high address.
52 ;; We assume 8 MB is the minimum DRAM in an eLinux
53 ;; product and put the sp at the top for now.
54
55 move.d 0x40800000, $sp
56
57 ;; Figure out where the compressed piggyback image is
58 ;; in the flash (since we wont try to copy it to DRAM
59 ;; before unpacking). It is at _edata, but in flash.
60 ;; Use (_edata - basse) as offset to the current PC.
61
62basse: move.d $pc, $r5
63 and.d 0x7fffffff, $r5 ; strip any non-cache bit
64 subq 2, $r5 ; compensate for the move.d $pc instr
65 move.d $r5, $r0 ; save for later - flash address of 'basse'
66 add.d _edata, $r5
67 sub.d basse, $r5 ; $r5 = flash address of '_edata'
68
69 ;; Copy text+data to DRAM
70
71 move.d basse, $r1 ; destination
72 move.d _edata, $r2 ; end destination
731: move.w [$r0+], $r3
74 move.w $r3, [$r1+]
75 cmp.d $r2, $r1
76 bcs 1b
77 nop
78
79 move.d $r5, [input_data] ; for the decompressor
80
81
82 ;; Clear the decompressors BSS (between _edata and _end)
83
84 moveq 0, $r0
85 move.d _edata, $r1
86 move.d _end, $r2
871: move.w $r0, [$r1+]
88 cmp.d $r2, $r1
89 bcs 1b
90 nop
91
92 ;; Save command line magic and address.
93 move.d _cmd_line_magic, $r12
94 move.d $r10, [$r12]
95 move.d _cmd_line_addr, $r12
96 move.d $r11, [$r12]
97
98 ;; Do the decompression and save compressed size in inptr
99
100 jsr decompress_kernel
101
102 ;; Put start address of root partition in $r9 so the kernel can use it
103 ;; when mounting from flash
104
105 move.d [input_data], $r9 ; flash address of compressed kernel
106 add.d [inptr], $r9 ; size of compressed kernel
107
108 ;; Restore command line magic and address.
109 move.d _cmd_line_magic, $r10
110 move.d [$r10], $r10
111 move.d _cmd_line_addr, $r11
112 move.d [$r11], $r11
113
114 ;; Enter the decompressed kernel
115 move.d RAM_INIT_MAGIC, $r8 ; Tell kernel that DRAM is initialized
116 jump 0x40004000 ; kernel is linked to this address
117
118 .data
119
120input_data:
121 .dword 0 ; used by the decompressor
122_cmd_line_magic:
123 .dword 0
124_cmd_line_addr:
125 .dword 0
126#include "../../arch-v10/lib/hw_settings.S"
diff --git a/arch/cris/boot/compressed/head_v32.S b/arch/cris/boot/compressed/head_v32.S
new file mode 100644
index 000000000000..f483005f3d48
--- /dev/null
+++ b/arch/cris/boot/compressed/head_v32.S
@@ -0,0 +1,145 @@
1/*
2 * Code that sets up the DRAM registers, calls the
3 * decompressor to unpack the piggybacked kernel, and jumps.
4 *
5 * Copyright (C) 1999 - 2006, Axis Communications AB
6 */
7
8#define ASSEMBLER_MACROS_ONLY
9#include <hwregs/asm/reg_map_asm.h>
10#include <mach/startup.inc>
11
12#define RAM_INIT_MAGIC 0x56902387
13#define COMMAND_LINE_MAGIC 0x87109563
14
15 ;; Exported symbols
16
17 .globl input_data
18
19 .text
20start:
21 di
22
23 ;; Start clocks for used blocks.
24 START_CLOCKS
25
26 ;; Initialize the DRAM registers.
27 cmp.d RAM_INIT_MAGIC, $r8 ; Already initialized?
28 beq dram_init_finished
29 nop
30
31#if defined CONFIG_ETRAXFS
32#include "../../arch-v32/mach-fs/dram_init.S"
33#elif defined CONFIG_CRIS_MACH_ARTPEC3
34#include "../../arch-v32/mach-a3/dram_init.S"
35#else
36#error Only ETRAXFS and ARTPEC-3 supported!
37#endif
38
39dram_init_finished:
40
41 GIO_INIT
42 ;; Setup the stack to a suitably high address.
43 ;; We assume 8 MB is the minimum DRAM and put
44 ;; the SP at the top for now.
45
46 move.d 0x40800000, $sp
47
48 ;; Figure out where the compressed piggyback image is.
49 ;; It is either in [NOR] flash (we don't want to copy it
50 ;; to DRAM before unpacking), or copied to DRAM
51 ;; by the [NAND] flash boot loader.
52 ;; The piggyback image is at _edata, but relative to where the
53 ;; image is actually located in memory, not where it is linked
54 ;; (the decompressor is linked at 0x40700000+ and runs there).
55 ;; Use (_edata - herami) as offset to the current PC.
56
57hereami:
58 lapcq ., $r5 ; get PC
59 and.d 0x7fffffff, $r5 ; strip any non-cache bit
60 move.d $r5, $r0 ; source address of 'herami'
61 add.d _edata, $r5
62 sub.d hereami, $r5 ; r5 = flash address of '_edata'
63 move.d hereami, $r1 ; destination
64
65 ;; Copy text+data to DRAM
66
67 move.d _edata, $r2 ; end destination
681: move.w [$r0+], $r3 ; from herami+ source
69 move.w $r3, [$r1+] ; to hereami+ destination (linked address)
70 cmp.d $r2, $r1 ; finish when destination == _edata
71 bcs 1b
72 nop
73 move.d input_data, $r0 ; for the decompressor
74 move.d $r5, [$r0] ; for the decompressor
75
76 ;; Clear the decompressors BSS (between _edata and _end)
77
78 moveq 0, $r0
79 move.d _edata, $r1
80 move.d _end, $r2
811: move.w $r0, [$r1+]
82 cmp.d $r2, $r1
83 bcs 1b
84 nop
85
86 ;; Save command line magic and address.
87 move.d _cmd_line_magic, $r0
88 move.d $r10, [$r0]
89 move.d _cmd_line_addr, $r0
90 move.d $r11, [$r0]
91
92 ;; Save boot source indicator
93 move.d _boot_source, $r0
94 move.d $r12, [$r0]
95
96 ;; Do the decompression and save compressed size in _inptr
97
98 jsr decompress_kernel
99 nop
100
101 ;; Restore boot source indicator
102 move.d _boot_source, $r12
103 move.d [$r12], $r12
104
105 ;; Restore command line magic and address.
106 move.d _cmd_line_magic, $r10
107 move.d [$r10], $r10
108 move.d _cmd_line_addr, $r11
109 move.d [$r11], $r11
110
111 ;; Put start address of root partition in r9 so the kernel can use it
112 ;; when mounting from flash
113 move.d input_data, $r0
114 move.d [$r0], $r9 ; flash address of compressed kernel
115 move.d inptr, $r0
116 add.d [$r0], $r9 ; size of compressed kernel
117 cmp.d 0x40000000, $r9 ; image in DRAM ?
118 blo enter_kernel ; no, must be [NOR] flash, jump
119 nop ; delay slot
120 and.d 0x001fffff, $r9 ; assume compressed kernel was < 2M
121
122enter_kernel:
123 ;; Enter the decompressed kernel
124 move.d RAM_INIT_MAGIC, $r8 ; Tell kernel that DRAM is initialized
125 jump 0x40004000 ; kernel is linked to this address
126 nop
127
128 .data
129
130input_data:
131 .dword 0 ; used by the decompressor
132_cmd_line_magic:
133 .dword 0
134_cmd_line_addr:
135 .dword 0
136_boot_source:
137 .dword 0
138
139#if defined CONFIG_ETRAXFS
140#include "../../arch-v32/mach-fs/hw_settings.S"
141#elif defined CONFIG_CRIS_MACH_ARTPEC3
142#include "../../arch-v32/mach-a3/hw_settings.S"
143#else
144#error Only ETRAXFS and ARTPEC-3 supported!
145#endif
diff --git a/arch/cris/boot/compressed/misc.c b/arch/cris/boot/compressed/misc.c
new file mode 100644
index 000000000000..47bc190ba6d4
--- /dev/null
+++ b/arch/cris/boot/compressed/misc.c
@@ -0,0 +1,391 @@
1/*
2 * misc.c
3 *
4 * This is a collection of several routines from gzip-1.0.3
5 * adapted for Linux.
6 *
7 * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
8 * puts by Nick Holloway 1993, better puts by Martin Mares 1995
9 * adaptation for Linux/CRIS Axis Communications AB, 1999
10 *
11 */
12
13/* where the piggybacked kernel image expects itself to live.
14 * it is the same address we use when we network load an uncompressed
15 * image into DRAM, and it is the address the kernel is linked to live
16 * at by vmlinux.lds.S
17 */
18
19#define KERNEL_LOAD_ADR 0x40004000
20
21#include <linux/types.h>
22
23#ifdef CONFIG_ETRAX_ARCH_V32
24#include <hwregs/reg_rdwr.h>
25#include <hwregs/reg_map.h>
26#include <hwregs/ser_defs.h>
27#include <hwregs/pinmux_defs.h>
28#ifdef CONFIG_CRIS_MACH_ARTPEC3
29#include <hwregs/clkgen_defs.h>
30#endif
31#else
32#include <arch/svinto.h>
33#endif
34
35/*
36 * gzip declarations
37 */
38
39#define OF(args) args
40#define STATIC static
41
42void *memset(void *s, int c, size_t n);
43void *memcpy(void *__dest, __const void *__src, size_t __n);
44
45#define memzero(s, n) memset((s), 0, (n))
46
47typedef unsigned char uch;
48typedef unsigned short ush;
49typedef unsigned long ulg;
50
51#define WSIZE 0x8000 /* Window size must be at least 32k, */
52 /* and a power of two */
53
54static uch *inbuf; /* input buffer */
55static uch window[WSIZE]; /* Sliding window buffer */
56
57unsigned inptr = 0; /* index of next byte to be processed in inbuf
58 * After decompression it will contain the
59 * compressed size, and head.S will read it.
60 */
61
62static unsigned outcnt = 0; /* bytes in output buffer */
63
64/* gzip flag byte */
65#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
66#define CONTINUATION 0x02 /* bit 1 set: continuation of multi-part gzip file */
67#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
68#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
69#define COMMENT 0x10 /* bit 4 set: file comment present */
70#define ENCRYPTED 0x20 /* bit 5 set: file is encrypted */
71#define RESERVED 0xC0 /* bit 6,7: reserved */
72
73#define get_byte() (inbuf[inptr++])
74
75/* Diagnostic functions */
76#ifdef DEBUG
77# define Assert(cond, msg) do { \
78 if (!(cond)) \
79 error(msg); \
80 } while (0)
81# define Trace(x) fprintf x
82# define Tracev(x) do { \
83 if (verbose) \
84 fprintf x; \
85 } while (0)
86# define Tracevv(x) do { \
87 if (verbose > 1) \
88 fprintf x; \
89 } while (0)
90# define Tracec(c, x) do { \
91 if (verbose && (c)) \
92 fprintf x; \
93 } while (0)
94# define Tracecv(c, x) do { \
95 if (verbose > 1 && (c)) \
96 fprintf x; \
97 } while (0)
98#else
99# define Assert(cond, msg)
100# define Trace(x)
101# define Tracev(x)
102# define Tracevv(x)
103# define Tracec(c, x)
104# define Tracecv(c, x)
105#endif
106
107static void flush_window(void);
108static void error(char *m);
109static void puts(const char *);
110
111extern char *input_data; /* lives in head.S */
112
113static long bytes_out;
114static uch *output_data;
115static unsigned long output_ptr;
116
117/* the "heap" is put directly after the BSS ends, at end */
118
119extern int _end;
120static long free_mem_ptr = (long)&_end;
121static long free_mem_end_ptr;
122
123#include "../../../../../lib/inflate.c"
124
125/* decompressor info and error messages to serial console */
126
127#ifdef CONFIG_ETRAX_ARCH_V32
128static inline void serout(const char *s, reg_scope_instances regi_ser)
129{
130 reg_ser_rs_stat_din rs;
131 reg_ser_rw_dout dout = {.data = *s};
132
133 do {
134 rs = REG_RD(ser, regi_ser, rs_stat_din);
135 }
136 while (!rs.tr_rdy);/* Wait for transceiver. */
137
138 REG_WR(ser, regi_ser, rw_dout, dout);
139}
140#endif
141
142static void puts(const char *s)
143{
144#ifndef CONFIG_ETRAX_DEBUG_PORT_NULL
145 while (*s) {
146#ifdef CONFIG_ETRAX_DEBUG_PORT0
147#ifdef CONFIG_ETRAX_ARCH_V32
148 serout(s, regi_ser0);
149#else
150 while (!(*R_SERIAL0_STATUS & (1 << 5)))
151 ;
152 *R_SERIAL0_TR_DATA = *s++;
153#endif
154#endif
155#ifdef CONFIG_ETRAX_DEBUG_PORT1
156#ifdef CONFIG_ETRAX_ARCH_V32
157 serout(s, regi_ser1);
158#else
159 while (!(*R_SERIAL1_STATUS & (1 << 5)))
160 ;
161 *R_SERIAL1_TR_DATA = *s++;
162#endif
163#endif
164#ifdef CONFIG_ETRAX_DEBUG_PORT2
165#ifdef CONFIG_ETRAX_ARCH_V32
166 serout(s, regi_ser2);
167#else
168 while (!(*R_SERIAL2_STATUS & (1 << 5)))
169 ;
170 *R_SERIAL2_TR_DATA = *s++;
171#endif
172#endif
173#ifdef CONFIG_ETRAX_DEBUG_PORT3
174#ifdef CONFIG_ETRAX_ARCH_V32
175 serout(s, regi_ser3);
176#else
177 while (!(*R_SERIAL3_STATUS & (1 << 5)))
178 ;
179 *R_SERIAL3_TR_DATA = *s++;
180#endif
181#endif
182 *s++;
183 }
184/* CONFIG_ETRAX_DEBUG_PORT_NULL */
185#endif
186}
187
188void *memset(void *s, int c, size_t n)
189{
190 int i;
191 char *ss = (char*)s;
192
193 for (i=0;i<n;i++) ss[i] = c;
194
195 return s;
196}
197
198void *memcpy(void *__dest, __const void *__src, size_t __n)
199{
200 int i;
201 char *d = (char *)__dest, *s = (char *)__src;
202
203 for (i = 0; i < __n; i++)
204 d[i] = s[i];
205
206 return __dest;
207}
208
209/* ===========================================================================
210 * Write the output window window[0..outcnt-1] and update crc and bytes_out.
211 * (Used for the decompressed data only.)
212 */
213
214static void flush_window(void)
215{
216 ulg c = crc; /* temporary variable */
217 unsigned n;
218 uch *in, *out, ch;
219
220 in = window;
221 out = &output_data[output_ptr];
222 for (n = 0; n < outcnt; n++) {
223 ch = *out = *in;
224 out++;
225 in++;
226 c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
227 }
228 crc = c;
229 bytes_out += (ulg)outcnt;
230 output_ptr += (ulg)outcnt;
231 outcnt = 0;
232}
233
234static void error(char *x)
235{
236 puts("\n\n");
237 puts(x);
238 puts("\n\n -- System halted\n");
239
240 while(1); /* Halt */
241}
242
243void setup_normal_output_buffer(void)
244{
245 output_data = (char *)KERNEL_LOAD_ADR;
246}
247
248#ifdef CONFIG_ETRAX_ARCH_V32
249static inline void serial_setup(reg_scope_instances regi_ser)
250{
251 reg_ser_rw_xoff xoff;
252 reg_ser_rw_tr_ctrl tr_ctrl;
253 reg_ser_rw_rec_ctrl rec_ctrl;
254 reg_ser_rw_tr_baud_div tr_baud;
255 reg_ser_rw_rec_baud_div rec_baud;
256
257 /* Turn off XOFF. */
258 xoff = REG_RD(ser, regi_ser, rw_xoff);
259
260 xoff.chr = 0;
261 xoff.automatic = regk_ser_no;
262
263 REG_WR(ser, regi_ser, rw_xoff, xoff);
264
265 /* Set baudrate and stopbits. */
266 tr_ctrl = REG_RD(ser, regi_ser, rw_tr_ctrl);
267 rec_ctrl = REG_RD(ser, regi_ser, rw_rec_ctrl);
268 tr_baud = REG_RD(ser, regi_ser, rw_tr_baud_div);
269 rec_baud = REG_RD(ser, regi_ser, rw_rec_baud_div);
270
271 tr_ctrl.stop_bits = 1; /* 2 stop bits. */
272 tr_ctrl.en = 1; /* enable transmitter */
273 rec_ctrl.en = 1; /* enabler receiver */
274
275 /*
276 * The baudrate setup used to be a bit fishy, but now transmitter and
277 * receiver are both set to the intended baud rate, 115200.
278 * The magic value is 29.493 MHz.
279 */
280 tr_ctrl.base_freq = regk_ser_f29_493;
281 rec_ctrl.base_freq = regk_ser_f29_493;
282 tr_baud.div = (29493000 / 8) / 115200;
283 rec_baud.div = (29493000 / 8) / 115200;
284
285 REG_WR(ser, regi_ser, rw_tr_ctrl, tr_ctrl);
286 REG_WR(ser, regi_ser, rw_tr_baud_div, tr_baud);
287 REG_WR(ser, regi_ser, rw_rec_ctrl, rec_ctrl);
288 REG_WR(ser, regi_ser, rw_rec_baud_div, rec_baud);
289}
290#endif
291
292void decompress_kernel(void)
293{
294 char revision;
295 char compile_rev;
296
297#ifdef CONFIG_ETRAX_ARCH_V32
298 /* Need at least a CRISv32 to run. */
299 compile_rev = 32;
300#if defined(CONFIG_ETRAX_DEBUG_PORT1) || \
301 defined(CONFIG_ETRAX_DEBUG_PORT2) || \
302 defined(CONFIG_ETRAX_DEBUG_PORT3)
303 reg_pinmux_rw_hwprot hwprot;
304
305#ifdef CONFIG_CRIS_MACH_ARTPEC3
306 reg_clkgen_rw_clk_ctrl clk_ctrl;
307
308 /* Enable corresponding clock region when serial 1..3 selected */
309
310 clk_ctrl = REG_RD(clkgen, regi_clkgen, rw_clk_ctrl);
311 clk_ctrl.sser_ser_dma6_7 = regk_clkgen_yes;
312 REG_WR(clkgen, regi_clkgen, rw_clk_ctrl, clk_ctrl);
313#endif
314
315 /* pinmux setup for ports 1..3 */
316 hwprot = REG_RD(pinmux, regi_pinmux, rw_hwprot);
317#endif
318
319
320#ifdef CONFIG_ETRAX_DEBUG_PORT0
321 serial_setup(regi_ser0);
322#endif
323#ifdef CONFIG_ETRAX_DEBUG_PORT1
324 hwprot.ser1 = regk_pinmux_yes;
325 serial_setup(regi_ser1);
326#endif
327#ifdef CONFIG_ETRAX_DEBUG_PORT2
328 hwprot.ser2 = regk_pinmux_yes;
329 serial_setup(regi_ser2);
330#endif
331#ifdef CONFIG_ETRAX_DEBUG_PORT3
332 hwprot.ser3 = regk_pinmux_yes;
333 serial_setup(regi_ser3);
334#endif
335#if defined(CONFIG_ETRAX_DEBUG_PORT1) || \
336 defined(CONFIG_ETRAX_DEBUG_PORT2) || \
337 defined(CONFIG_ETRAX_DEBUG_PORT3)
338 REG_WR(pinmux, regi_pinmux, rw_hwprot, hwprot);
339#endif
340
341 /* input_data is set in head.S */
342 inbuf = input_data;
343#else /* CRISv10 */
344 /* Need at least a crisv10 to run. */
345 compile_rev = 10;
346
347 /* input_data is set in head.S */
348 inbuf = input_data;
349
350#ifdef CONFIG_ETRAX_DEBUG_PORT0
351 *R_SERIAL0_XOFF = 0;
352 *R_SERIAL0_BAUD = 0x99;
353 *R_SERIAL0_TR_CTRL = 0x40;
354#endif
355#ifdef CONFIG_ETRAX_DEBUG_PORT1
356 *R_SERIAL1_XOFF = 0;
357 *R_SERIAL1_BAUD = 0x99;
358 *R_SERIAL1_TR_CTRL = 0x40;
359#endif
360#ifdef CONFIG_ETRAX_DEBUG_PORT2
361 *R_GEN_CONFIG = 0x08;
362 *R_SERIAL2_XOFF = 0;
363 *R_SERIAL2_BAUD = 0x99;
364 *R_SERIAL2_TR_CTRL = 0x40;
365#endif
366#ifdef CONFIG_ETRAX_DEBUG_PORT3
367 *R_GEN_CONFIG = 0x100;
368 *R_SERIAL3_XOFF = 0;
369 *R_SERIAL3_BAUD = 0x99;
370 *R_SERIAL3_TR_CTRL = 0x40;
371#endif
372#endif
373
374 setup_normal_output_buffer();
375
376 makecrc();
377
378 __asm__ volatile ("move $vr,%0" : "=rm" (revision));
379 if (revision < compile_rev) {
380#ifdef CONFIG_ETRAX_ARCH_V32
381 puts("You need an ETRAX FS to run Linux 2.6/crisv32\n");
382#else
383 puts("You need an ETRAX 100LX to run linux 2.6\n");
384#endif
385 while(1);
386 }
387
388 puts("Uncompressing Linux...\n");
389 gunzip();
390 puts("Done. Now booting the kernel\n");
391}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-29 12:03:23 -0500