b2ba34f370
In the device tree for Ebony, the 'ranges' property in the node for the EBC bridge shows the mappings from the chip select / address lines actually used for the EBC peripherals into the address space of the OPB. At present, these mappings are hardcoded in ebony.dts for the mappings set up by the OpenBIOS firmware when it configures the EBC bridge. This replaces the hardcoded mappings with code in the zImage to read the EBC configuration registers and create an appropriate ranges property based on them. This should make the zImage and kernel more robust to changes in firmware configuration. In particular, some of the Ebony's DIP switches can change the effective address of the Flash and other peripherals in OPB space. With this patch, the kernel will be able to cope with at least some of the possible variations. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
20 lines
517 B
C
20 lines
517 B
C
/*
|
|
* PowerPC 44x related functions
|
|
*
|
|
* Copyright 2007 David Gibson, IBM Corporation.
|
|
*
|
|
* 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.
|
|
*/
|
|
#ifndef _PPC_BOOT_44X_H_
|
|
#define _PPC_BOOT_44X_H_
|
|
|
|
void ibm44x_fixup_memsize(void);
|
|
void ibm4xx_fixup_ebc_ranges(const char *ebc);
|
|
|
|
void ibm44x_dbcr_reset(void);
|
|
void ebony_init(void *mac0, void *mac1);
|
|
|
|
#endif /* _PPC_BOOT_44X_H_ */
|