mirror of
https://github.com/ipxe/ipxe
synced 2025-12-08 02:10:25 +03:00
[fdt] Add ability to locate node by phandle
Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
@@ -482,6 +482,57 @@ int fdt_alias ( struct fdt *fdt, const char *name, unsigned int *offset ) {
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return 0;
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}
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/**
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* Find node by package handle (phandle)
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*
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* @v fdt Device tree
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* @v phandle Package handle
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* @v offset Offset to fill in
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* @ret rc Return status code
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*/
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int fdt_phandle ( struct fdt *fdt, uint32_t phandle, unsigned int *offset ) {
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struct fdt_descriptor desc;
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uint32_t value;
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int depth;
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int rc;
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/* Initialise offset */
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*offset = 0;
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/* Find node with matching phandle */
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for ( depth = -1 ; ; depth += desc.depth, *offset = desc.next ) {
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/* Describe token */
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if ( ( rc = fdt_describe ( fdt, *offset, &desc ) ) != 0 ) {
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DBGC ( fdt, "FDT +%#04x has malformed node: %s\n",
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*offset, strerror ( rc ) );
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return rc;
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}
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/* Terminate when we exit the root node */
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if ( ( depth == 0 ) && ( desc.depth < 0 ) )
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break;
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/* Ignore non-nodes */
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if ( ( ! desc.name ) || desc.data )
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continue;
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/* Check for matching "phandle" or "linux-phandle" property */
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if ( ( ( ( rc = fdt_u32 ( fdt, *offset, "phandle",
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&value ) ) == 0 ) ||
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( ( rc = fdt_u32 ( fdt, *offset, "linux,phandle",
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&value ) ) == 0 ) ) &&
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( value == phandle ) ) {
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DBGC2 ( fdt, "FDT +%#04x has phandle %#02x\n",
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*offset, phandle );
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return 0;
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}
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}
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DBGC ( fdt, "FDT has no phandle %#02x\n", phandle );
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return -ENOENT;
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}
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/**
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* Find property
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*
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@@ -176,6 +176,8 @@ extern int fdt_path ( struct fdt *fdt, const char *path,
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unsigned int *offset );
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extern int fdt_alias ( struct fdt *fdt, const char *name,
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unsigned int *offset );
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extern int fdt_phandle ( struct fdt *fdt, uint32_t phandle,
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unsigned int *offset );
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extern const char * fdt_strings ( struct fdt *fdt, unsigned int offset,
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const char *name, unsigned int *count );
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extern const char * fdt_string ( struct fdt *fdt, unsigned int offset,
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@@ -39,10 +39,10 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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/** Simplified QEMU sifive_u device tree blob */
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static const uint8_t sifive_u[] = {
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0xd0, 0x0d, 0xfe, 0xed, 0x00, 0x00, 0x05, 0x61, 0x00, 0x00, 0x00, 0x38,
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0x00, 0x00, 0x04, 0x7c, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x11,
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0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xe5,
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0x00, 0x00, 0x04, 0x44, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0xd0, 0x0d, 0xfe, 0xed, 0x00, 0x00, 0x05, 0x8f, 0x00, 0x00, 0x00, 0x38,
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0x00, 0x00, 0x04, 0x9c, 0x00, 0x00, 0x00, 0x28, 0x00, 0x00, 0x00, 0x11,
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0x00, 0x00, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf3,
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0x00, 0x00, 0x04, 0x64, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03,
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@@ -90,70 +90,74 @@ static const uint8_t sifive_u[] = {
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0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0xe9, 0x00, 0x00, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04,
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0x00, 0x00, 0x00, 0xaa, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x02,
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0x00, 0x00, 0x00, 0x09, 0x23, 0x61, 0x64, 0x64, 0x72, 0x65, 0x73, 0x73,
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0x2d, 0x63, 0x65, 0x6c, 0x6c, 0x73, 0x00, 0x23, 0x73, 0x69, 0x7a, 0x65,
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0x2d, 0x63, 0x65, 0x6c, 0x6c, 0x73, 0x00, 0x63, 0x6f, 0x6d, 0x70, 0x61,
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0x74, 0x69, 0x62, 0x6c, 0x65, 0x00, 0x6d, 0x6f, 0x64, 0x65, 0x6c, 0x00,
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0x73, 0x74, 0x64, 0x6f, 0x75, 0x74, 0x2d, 0x70, 0x61, 0x74, 0x68, 0x00,
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0x73, 0x65, 0x72, 0x69, 0x61, 0x6c, 0x30, 0x00, 0x65, 0x74, 0x68, 0x65,
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0x72, 0x6e, 0x65, 0x74, 0x30, 0x00, 0x74, 0x69, 0x6d, 0x65, 0x62, 0x61,
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0x73, 0x65, 0x2d, 0x66, 0x72, 0x65, 0x71, 0x75, 0x65, 0x6e, 0x63, 0x79,
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0x00, 0x64, 0x65, 0x76, 0x69, 0x63, 0x65, 0x5f, 0x74, 0x79, 0x70, 0x65,
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0x00, 0x72, 0x65, 0x67, 0x00, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x00,
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0x72, 0x69, 0x73, 0x63, 0x76, 0x2c, 0x69, 0x73, 0x61, 0x00, 0x23, 0x69,
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0x6e, 0x74, 0x65, 0x72, 0x72, 0x75, 0x70, 0x74, 0x2d, 0x63, 0x65, 0x6c,
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0x6c, 0x73, 0x00, 0x69, 0x6e, 0x74, 0x65, 0x72, 0x72, 0x75, 0x70, 0x74,
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0x2d, 0x63, 0x6f, 0x6e, 0x74, 0x72, 0x6f, 0x6c, 0x6c, 0x65, 0x72, 0x00,
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0x6c, 0x69, 0x6e, 0x75, 0x78, 0x2c, 0x70, 0x68, 0x61, 0x6e, 0x64, 0x6c,
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0x65, 0x00, 0x72, 0x61, 0x6e, 0x67, 0x65, 0x73, 0x00, 0x6c, 0x6f, 0x63,
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0x61, 0x6c, 0x2d, 0x6d, 0x61, 0x63, 0x2d, 0x61, 0x64, 0x64, 0x72, 0x65,
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0x73, 0x73, 0x00, 0x70, 0x68, 0x79, 0x2d, 0x68, 0x61, 0x6e, 0x64, 0x6c,
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0x65, 0x00, 0x70, 0x68, 0x79, 0x2d, 0x6d, 0x6f, 0x64, 0x65, 0x00, 0x72,
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0x65, 0x67, 0x2d, 0x6e, 0x61, 0x6d, 0x65, 0x73, 0x00, 0x6d, 0x61, 0x78,
|
||||
0x2d, 0x73, 0x70, 0x65, 0x65, 0x64, 0x00
|
||||
};
|
||||
|
||||
/**
|
||||
@@ -257,6 +261,15 @@ static void fdt_test_exec ( void ) {
|
||||
ok ( ( string = fdt_string ( &fdt, offset, "phy-mode" ) ) != NULL );
|
||||
ok ( strcmp ( string, "gmii" ) == 0 );
|
||||
|
||||
/* Verify phandle lookup */
|
||||
ok ( fdt_phandle ( &fdt, 0x03, &offset ) == 0 );
|
||||
ok ( fdt_describe ( &fdt, offset, &desc ) == 0 );
|
||||
ok ( strcmp ( desc.name, "interrupt-controller" ) == 0 );
|
||||
ok ( fdt_phandle ( &fdt, 0x08, &offset ) == 0 );
|
||||
ok ( fdt_describe ( &fdt, offset, &desc ) == 0 );
|
||||
ok ( strcmp ( desc.name, "ethernet-phy@0" ) == 0 );
|
||||
ok ( fdt_phandle ( &fdt, 0x2a, &offset ) != 0 );
|
||||
|
||||
/* Verify node description */
|
||||
ok ( fdt_path ( &fdt, "/memory@80000000", &offset ) == 0 );
|
||||
ok ( fdt_describe ( &fdt, offset, &desc ) == 0 );
|
||||
|
||||
Reference in New Issue
Block a user