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author | Sam Ravnborg <sam@ravnborg.org> | 2008-11-30 06:15:38 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2008-12-04 17:17:16 (GMT) |
commit | 708d4f09647106d549c646dc459c7ccf2c237cc8 (patch) | |
tree | 23657862535d88fcb71bc416c51c27cd480a93c4 /arch/sparc/prom/tree_32.c | |
parent | 5e53879008b9acefe9f43498fd36db7376e08739 (diff) | |
download | linux-fsl-qoriq-708d4f09647106d549c646dc459c7ccf2c237cc8.tar.xz |
sparc: prepare prom/ for unification
- rename files where sparc64 uses identical names to *_32.c
- refactor Makefile (but keep linking order)
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/prom/tree_32.c')
-rw-r--r-- | arch/sparc/prom/tree_32.c | 346 |
1 files changed, 346 insertions, 0 deletions
diff --git a/arch/sparc/prom/tree_32.c b/arch/sparc/prom/tree_32.c new file mode 100644 index 0000000..f228fe0 --- /dev/null +++ b/arch/sparc/prom/tree_32.c @@ -0,0 +1,346 @@ +/* + * tree.c: Basic device tree traversal/scanning for the Linux + * prom library. + * + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + */ + +#define PROMLIB_INTERNAL + +#include <linux/string.h> +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/ctype.h> + +#include <asm/openprom.h> +#include <asm/oplib.h> + +extern void restore_current(void); + +static char promlib_buf[128]; + +/* Internal version of prom_getchild that does not alter return values. */ +int __prom_getchild(int node) +{ + unsigned long flags; + int cnode; + + spin_lock_irqsave(&prom_lock, flags); + cnode = prom_nodeops->no_child(node); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + + return cnode; +} + +/* Return the child of node 'node' or zero if no this node has no + * direct descendent. + */ +int prom_getchild(int node) +{ + int cnode; + + if (node == -1) + return 0; + + cnode = __prom_getchild(node); + if (cnode == 0 || cnode == -1) + return 0; + + return cnode; +} + +/* Internal version of prom_getsibling that does not alter return values. */ +int __prom_getsibling(int node) +{ + unsigned long flags; + int cnode; + + spin_lock_irqsave(&prom_lock, flags); + cnode = prom_nodeops->no_nextnode(node); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + + return cnode; +} + +/* Return the next sibling of node 'node' or zero if no more siblings + * at this level of depth in the tree. + */ +int prom_getsibling(int node) +{ + int sibnode; + + if (node == -1) + return 0; + + sibnode = __prom_getsibling(node); + if (sibnode == 0 || sibnode == -1) + return 0; + + return sibnode; +} + +/* Return the length in bytes of property 'prop' at node 'node'. + * Return -1 on error. + */ +int prom_getproplen(int node, char *prop) +{ + int ret; + unsigned long flags; + + if((!node) || (!prop)) + return -1; + + spin_lock_irqsave(&prom_lock, flags); + ret = prom_nodeops->no_proplen(node, prop); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return ret; +} + +/* Acquire a property 'prop' at node 'node' and place it in + * 'buffer' which has a size of 'bufsize'. If the acquisition + * was successful the length will be returned, else -1 is returned. + */ +int prom_getproperty(int node, char *prop, char *buffer, int bufsize) +{ + int plen, ret; + unsigned long flags; + + plen = prom_getproplen(node, prop); + if((plen > bufsize) || (plen == 0) || (plen == -1)) + return -1; + /* Ok, things seem all right. */ + spin_lock_irqsave(&prom_lock, flags); + ret = prom_nodeops->no_getprop(node, prop, buffer); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return ret; +} + +/* Acquire an integer property and return its value. Returns -1 + * on failure. + */ +int prom_getint(int node, char *prop) +{ + static int intprop; + + if(prom_getproperty(node, prop, (char *) &intprop, sizeof(int)) != -1) + return intprop; + + return -1; +} + +/* Acquire an integer property, upon error return the passed default + * integer. + */ +int prom_getintdefault(int node, char *property, int deflt) +{ + int retval; + + retval = prom_getint(node, property); + if(retval == -1) return deflt; + + return retval; +} + +/* Acquire a boolean property, 1=TRUE 0=FALSE. */ +int prom_getbool(int node, char *prop) +{ + int retval; + + retval = prom_getproplen(node, prop); + if(retval == -1) return 0; + return 1; +} + +/* Acquire a property whose value is a string, returns a null + * string on error. The char pointer is the user supplied string + * buffer. + */ +void prom_getstring(int node, char *prop, char *user_buf, int ubuf_size) +{ + int len; + + len = prom_getproperty(node, prop, user_buf, ubuf_size); + if(len != -1) return; + user_buf[0] = 0; + return; +} + + +/* Does the device at node 'node' have name 'name'? + * YES = 1 NO = 0 + */ +int prom_nodematch(int node, char *name) +{ + int error; + + static char namebuf[128]; + error = prom_getproperty(node, "name", namebuf, sizeof(namebuf)); + if (error == -1) return 0; + if(strcmp(namebuf, name) == 0) return 1; + return 0; +} + +/* Search siblings at 'node_start' for a node with name + * 'nodename'. Return node if successful, zero if not. + */ +int prom_searchsiblings(int node_start, char *nodename) +{ + + int thisnode, error; + + for(thisnode = node_start; thisnode; + thisnode=prom_getsibling(thisnode)) { + error = prom_getproperty(thisnode, "name", promlib_buf, + sizeof(promlib_buf)); + /* Should this ever happen? */ + if(error == -1) continue; + if(strcmp(nodename, promlib_buf)==0) return thisnode; + } + + return 0; +} + +/* Interal version of nextprop that does not alter return values. */ +char * __prom_nextprop(int node, char * oprop) +{ + unsigned long flags; + char *prop; + + spin_lock_irqsave(&prom_lock, flags); + prop = prom_nodeops->no_nextprop(node, oprop); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + + return prop; +} + +/* Return the first property name for node 'node'. */ +/* buffer is unused argument, but as v9 uses it, we need to have the same interface */ +char * prom_firstprop(int node, char *bufer) +{ + if (node == 0 || node == -1) + return ""; + + return __prom_nextprop(node, ""); +} + +/* Return the property type string after property type 'oprop' + * at node 'node' . Returns empty string if no more + * property types for this node. + */ +char * prom_nextprop(int node, char *oprop, char *buffer) +{ + if (node == 0 || node == -1) + return ""; + + return __prom_nextprop(node, oprop); +} + +int prom_finddevice(char *name) +{ + char nbuf[128]; + char *s = name, *d; + int node = prom_root_node, node2; + unsigned int which_io, phys_addr; + struct linux_prom_registers reg[PROMREG_MAX]; + + while (*s++) { + if (!*s) return node; /* path '.../' is legal */ + node = prom_getchild(node); + + for (d = nbuf; *s != 0 && *s != '@' && *s != '/';) + *d++ = *s++; + *d = 0; + + node = prom_searchsiblings(node, nbuf); + if (!node) + return 0; + + if (*s == '@') { + if (isxdigit(s[1]) && s[2] == ',') { + which_io = simple_strtoul(s+1, NULL, 16); + phys_addr = simple_strtoul(s+3, &d, 16); + if (d != s + 3 && (!*d || *d == '/') + && d <= s + 3 + 8) { + node2 = node; + while (node2 && node2 != -1) { + if (prom_getproperty (node2, "reg", (char *)reg, sizeof (reg)) > 0) { + if (which_io == reg[0].which_io && phys_addr == reg[0].phys_addr) { + node = node2; + break; + } + } + node2 = prom_getsibling(node2); + if (!node2 || node2 == -1) + break; + node2 = prom_searchsiblings(prom_getsibling(node2), nbuf); + } + } + } + while (*s != 0 && *s != '/') s++; + } + } + return node; +} + +int prom_node_has_property(int node, char *prop) +{ + char *current_property = ""; + + do { + current_property = prom_nextprop(node, current_property, NULL); + if(!strcmp(current_property, prop)) + return 1; + } while (*current_property); + return 0; +} + +/* Set property 'pname' at node 'node' to value 'value' which has a length + * of 'size' bytes. Return the number of bytes the prom accepted. + */ +int prom_setprop(int node, char *pname, char *value, int size) +{ + unsigned long flags; + int ret; + + if(size == 0) return 0; + if((pname == 0) || (value == 0)) return 0; + spin_lock_irqsave(&prom_lock, flags); + ret = prom_nodeops->no_setprop(node, pname, value, size); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + return ret; +} + +int prom_inst2pkg(int inst) +{ + int node; + unsigned long flags; + + spin_lock_irqsave(&prom_lock, flags); + node = (*romvec->pv_v2devops.v2_inst2pkg)(inst); + restore_current(); + spin_unlock_irqrestore(&prom_lock, flags); + if (node == -1) return 0; + return node; +} + +/* Return 'node' assigned to a particular prom 'path' + * FIXME: Should work for v0 as well + */ +int prom_pathtoinode(char *path) +{ + int node, inst; + + inst = prom_devopen (path); + if (inst == -1) return 0; + node = prom_inst2pkg (inst); + prom_devclose (inst); + if (node == -1) return 0; + return node; +} |