35af89eb49
This makes 2 changes to clean up the flat device tree handling logic in the zImage wrapper. First, there were two callbacks from the dt_ops structure used for producing a final flat tree to pass to the kerne: dt_ops.ft_pack() which packed the flat tree (possibly a no-op) and dt_ops.ft_addr() which retreived the address of the final blob. Since they were only ever called together, this patch combines the two into a single new callback, dt_ops.finalize(). This new callback does whatever platform-dependent things are necessary to produce a final flat device tree blob, and returns the blob's addres. Second, the current logic calls the kernel with a flat device tree if one is build into the zImage wrapper, otherwise it boots the kernel with a PROM pointer, expecting the kernel to copy the OF device tree itself. This approach precludes the possibility of the platform wrapper code building a flat device tree from whatever platform-specific information firmware provides. Thus, this patch takes the more sensible approach of invoking the kernel with a flat tree if the dt_ops.finalize callback provides one (by whatever means). So, the dt_ops.finalize callback can be NULL, or can be a function which returns NULL. In either case, the zImage wrapper logic assumes that this is a platform with OF and invokes the kernel accordingly. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
102 lines
2.6 KiB
C
102 lines
2.6 KiB
C
/*
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* Global definition of all the bootwrapper operations.
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*
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* Author: Mark A. Greer <mgreer@mvista.com>
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*
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* 2006 (c) MontaVista Software, Inc. This file is licensed under
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* the terms of the GNU General Public License version 2. This program
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* is licensed "as is" without any warranty of any kind, whether express
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* or implied.
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*/
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#ifndef _PPC_BOOT_OPS_H_
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#define _PPC_BOOT_OPS_H_
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#include "types.h"
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#define COMMAND_LINE_SIZE 512
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#define MAX_PATH_LEN 256
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#define MAX_PROP_LEN 256 /* What should this be? */
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/* Platform specific operations */
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struct platform_ops {
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void (*fixups)(void);
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void (*image_hdr)(const void *);
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void * (*malloc)(u32 size);
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void (*free)(void *ptr);
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void * (*realloc)(void *ptr, unsigned long size);
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void (*exit)(void);
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};
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extern struct platform_ops platform_ops;
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/* Device Tree operations */
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struct dt_ops {
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void * (*finddevice)(const char *name);
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int (*getprop)(const void *phandle, const char *name, void *buf,
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const int buflen);
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int (*setprop)(const void *phandle, const char *name,
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const void *buf, const int buflen);
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unsigned long (*finalize)(void);
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};
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extern struct dt_ops dt_ops;
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/* Console operations */
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struct console_ops {
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int (*open)(void);
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void (*write)(char *buf, int len);
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void (*edit_cmdline)(char *buf, int len);
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void (*close)(void);
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void *data;
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};
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extern struct console_ops console_ops;
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/* Serial console operations */
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struct serial_console_data {
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int (*open)(void);
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void (*putc)(unsigned char c);
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unsigned char (*getc)(void);
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u8 (*tstc)(void);
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void (*close)(void);
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};
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int platform_init(void *promptr, char *dt_blob_start, char *dt_blob_end);
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int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
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int serial_console_init(void);
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int ns16550_console_init(void *devp, struct serial_console_data *scdp);
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void *simple_alloc_init(char *base, u32 heap_size, u32 granularity,
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u32 max_allocs);
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static inline void *finddevice(const char *name)
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{
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return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
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}
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static inline int getprop(void *devp, const char *name, void *buf, int buflen)
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{
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return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
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}
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static inline int setprop(void *devp, const char *name, void *buf, int buflen)
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{
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return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
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}
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static inline void *malloc(u32 size)
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{
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return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
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}
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static inline void free(void *ptr)
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{
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if (platform_ops.free)
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platform_ops.free(ptr);
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}
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static inline void exit(void)
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{
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if (platform_ops.exit)
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platform_ops.exit();
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for(;;);
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}
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#endif /* _PPC_BOOT_OPS_H_ */
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