mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-29 20:46:41 +07:00
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>
103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
|
|
* Global definition of all the bootwrapper operations.
|
|
*
|
|
* Author: Mark A. Greer <mgreer@mvista.com>
|
|
*
|
|
* 2006 (c) MontaVista Software, Inc. 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_OPS_H_
|
|
#define _PPC_BOOT_OPS_H_
|
|
|
|
#include "types.h"
|
|
|
|
#define COMMAND_LINE_SIZE 512
|
|
#define MAX_PATH_LEN 256
|
|
#define MAX_PROP_LEN 256 /* What should this be? */
|
|
|
|
/* Platform specific operations */
|
|
struct platform_ops {
|
|
void (*fixups)(void);
|
|
void (*image_hdr)(const void *);
|
|
void * (*malloc)(u32 size);
|
|
void (*free)(void *ptr);
|
|
void * (*realloc)(void *ptr, unsigned long size);
|
|
void (*exit)(void);
|
|
};
|
|
extern struct platform_ops platform_ops;
|
|
|
|
/* Device Tree operations */
|
|
struct dt_ops {
|
|
void * (*finddevice)(const char *name);
|
|
int (*getprop)(const void *phandle, const char *name, void *buf,
|
|
const int buflen);
|
|
int (*setprop)(const void *phandle, const char *name,
|
|
const void *buf, const int buflen);
|
|
unsigned long (*finalize)(void);
|
|
};
|
|
extern struct dt_ops dt_ops;
|
|
|
|
/* Console operations */
|
|
struct console_ops {
|
|
int (*open)(void);
|
|
void (*write)(char *buf, int len);
|
|
void (*edit_cmdline)(char *buf, int len);
|
|
void (*close)(void);
|
|
void *data;
|
|
};
|
|
extern struct console_ops console_ops;
|
|
|
|
/* Serial console operations */
|
|
struct serial_console_data {
|
|
int (*open)(void);
|
|
void (*putc)(unsigned char c);
|
|
unsigned char (*getc)(void);
|
|
u8 (*tstc)(void);
|
|
void (*close)(void);
|
|
};
|
|
|
|
int platform_init(void *promptr, char *dt_blob_start, char *dt_blob_end);
|
|
int ft_init(void *dt_blob, unsigned int max_size, unsigned int max_find_device);
|
|
int serial_console_init(void);
|
|
int ns16550_console_init(void *devp, struct serial_console_data *scdp);
|
|
void *simple_alloc_init(char *base, u32 heap_size, u32 granularity,
|
|
u32 max_allocs);
|
|
|
|
|
|
static inline void *finddevice(const char *name)
|
|
{
|
|
return (dt_ops.finddevice) ? dt_ops.finddevice(name) : NULL;
|
|
}
|
|
|
|
static inline int getprop(void *devp, const char *name, void *buf, int buflen)
|
|
{
|
|
return (dt_ops.getprop) ? dt_ops.getprop(devp, name, buf, buflen) : -1;
|
|
}
|
|
|
|
static inline int setprop(void *devp, const char *name, void *buf, int buflen)
|
|
{
|
|
return (dt_ops.setprop) ? dt_ops.setprop(devp, name, buf, buflen) : -1;
|
|
}
|
|
|
|
static inline void *malloc(u32 size)
|
|
{
|
|
return (platform_ops.malloc) ? platform_ops.malloc(size) : NULL;
|
|
}
|
|
|
|
static inline void free(void *ptr)
|
|
{
|
|
if (platform_ops.free)
|
|
platform_ops.free(ptr);
|
|
}
|
|
|
|
static inline void exit(void)
|
|
{
|
|
if (platform_ops.exit)
|
|
platform_ops.exit();
|
|
for(;;);
|
|
}
|
|
|
|
#endif /* _PPC_BOOT_OPS_H_ */
|