2 * linux/arch/arm/boot/compressed/ofw-shark.c
6 * This file is used to get some basic information
7 * about the memory layout of the shark we are running
8 * on. Memory is usually divided in blocks a 8 MB.
9 * And bootargs are copied from OpenFirmware.
13 #include <linux/kernel.h>
14 #include <linux/types.h>
15 #include <asm/setup.h>
20 create_params (unsigned long *buffer)
22 /* Is there a better address? Also change in mach-shark/core.c */
23 struct tag *tag = (struct tag *) 0x08003000;
24 int j,i,m,k,nr_banks,size;
29 /* Head of the taglist */
30 tag->hdr.tag = ATAG_CORE;
31 tag->hdr.size = tag_size(tag_core);
32 tag->u.core.flags = 1;
33 tag->u.core.pagesize = PAGE_SIZE;
34 tag->u.core.rootdev = 0;
36 /* Build up one tagged block for each memory region */
38 nr_banks=(unsigned int) buffer[0];
39 for (j=0;j<nr_banks;j++){
40 /* search the lowest address and put it into the next entry */
41 /* not a fast sort algorithm, but there are at most 8 entries */
42 /* and this is used only once anyway */
44 for (i=0;i<(unsigned int) buffer[0];i++){
45 if (buffer[2*i+1]<m) {
52 tag->hdr.tag = ATAG_MEM;
53 tag->hdr.size = tag_size(tag_mem32);
54 tag->u.mem.size = buffer[2*k+2];
55 tag->u.mem.start = buffer[2*k+1];
57 size += buffer[2*k+2];
59 buffer[2*k+1]=0xffffffff; /* mark as copied */
62 /* The command line */
64 tag->hdr.tag = ATAG_CMDLINE;
66 c=(unsigned char *)(&buffer[34]);
68 while (*c) tag->u.cmdline.cmdline[j++]=*c++;
70 tag->u.cmdline.cmdline[j]=0;
71 tag->hdr.size = (j + 7 + sizeof(struct tag_header)) >> 2;
73 /* Hardware revision */
75 tag->hdr.tag = ATAG_REVISION;
76 tag->hdr.size = tag_size(tag_revision);
77 tag->u.revision.rev = ((unsigned char) buffer[33])-'0';
79 /* End of the taglist */
86 typedef int (*ofw_handle_t)(void *);
88 /* Everything below is called with a wrong MMU setting.
89 * This means: no string constants, no initialization of
90 * arrays, no global variables! This is ugly but I didn't
91 * want to write this in assembler :-)
95 of_decode_int(const unsigned char *p)
97 unsigned int i = *p++ << 8;
104 OF_finddevice(ofw_handle_t openfirmware, char *name)
106 unsigned int args[8];
121 args[0]=(unsigned int)service;
124 args[3]=(unsigned int)name;
126 if (openfirmware(args) == -1)
132 OF_getproplen(ofw_handle_t openfirmware, int handle, char *prop)
134 unsigned int args[8];
149 args[0] = (unsigned int)service;
152 args[3] = (unsigned int)handle;
153 args[4] = (unsigned int)prop;
155 if (openfirmware(args) == -1)
161 OF_getprop(ofw_handle_t openfirmware, int handle, char *prop, void *buf, unsigned int buflen)
163 unsigned int args[8];
175 args[0] = (unsigned int)service;
178 args[3] = (unsigned int)handle;
179 args[4] = (unsigned int)prop;
180 args[5] = (unsigned int)buf;
183 if (openfirmware(args) == -1)
188 asmlinkage void ofw_init(ofw_handle_t o, int *nomr, int *pointer)
190 int phandle,i,mem_len,buffer[32];
202 phandle=OF_finddevice(o,temp);
209 mem_len = OF_getproplen(o,phandle, temp);
210 OF_getprop(o,phandle, temp, buffer, mem_len);
213 for (i=0; i<=mem_len/4; i++) pointer[i]=of_decode_int((const unsigned char *)&buffer[i]);
224 phandle=OF_finddevice(o,temp);
236 mem_len = OF_getproplen(o,phandle, temp);
237 OF_getprop(o,phandle, temp, buffer, mem_len);
238 if (mem_len > 128) mem_len=128;
239 for (i=0; i<=mem_len/4; i++) pointer[i+33]=buffer[i];
244 phandle=OF_finddevice(o,temp);
257 mem_len = OF_getproplen(o,phandle, temp);
258 OF_getprop(o,phandle, temp, buffer, mem_len);
259 (unsigned char) pointer[32] = ((unsigned char *) buffer)[mem_len-2];