mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 19:10:13 +00:00
00caae6d47
We are now using an env_ prefix for environment functions. Rename these two functions for consistency. Also add function comments in common.h. Quite a few places use getenv() in a condition context, provoking a warning from checkpatch. These are fixed up in this patch also. Suggested-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Simon Glass <sjg@chromium.org>
694 lines
14 KiB
C
694 lines
14 KiB
C
/*
|
|
* (C) Copyright 2007 Semihalf
|
|
*
|
|
* Written by: Rafal Jaworowski <raj@semihalf.com>
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <config.h>
|
|
#include <command.h>
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
#include <environment.h>
|
|
#include <linux/types.h>
|
|
#include <api_public.h>
|
|
|
|
#include "api_private.h"
|
|
|
|
#define DEBUG
|
|
#undef DEBUG
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* This is the API core.
|
|
*
|
|
* API_ functions are part of U-Boot code and constitute the lowest level
|
|
* calls:
|
|
*
|
|
* - they know what values they need as arguments
|
|
* - their direct return value pertains to the API_ "shell" itself (0 on
|
|
* success, some error code otherwise)
|
|
* - if the call returns a value it is buried within arguments
|
|
*
|
|
****************************************************************************/
|
|
|
|
#ifdef DEBUG
|
|
#define debugf(fmt, args...) do { printf("%s(): ", __func__); printf(fmt, ##args); } while (0)
|
|
#else
|
|
#define debugf(fmt, args...)
|
|
#endif
|
|
|
|
typedef int (*cfp_t)(va_list argp);
|
|
|
|
static int calls_no;
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_getc(int *c)
|
|
*/
|
|
static int API_getc(va_list ap)
|
|
{
|
|
int *c;
|
|
|
|
if ((c = (int *)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
*c = getc();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_tstc(int *c)
|
|
*/
|
|
static int API_tstc(va_list ap)
|
|
{
|
|
int *t;
|
|
|
|
if ((t = (int *)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
*t = tstc();
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_putc(char *ch)
|
|
*/
|
|
static int API_putc(va_list ap)
|
|
{
|
|
char *c;
|
|
|
|
if ((c = (char *)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
putc(*c);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_puts(char **s)
|
|
*/
|
|
static int API_puts(va_list ap)
|
|
{
|
|
char *s;
|
|
|
|
if ((s = (char *)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
puts(s);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_reset(void)
|
|
*/
|
|
static int API_reset(va_list ap)
|
|
{
|
|
do_reset(NULL, 0, 0, NULL);
|
|
|
|
/* NOT REACHED */
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_get_sys_info(struct sys_info *si)
|
|
*
|
|
* fill out the sys_info struct containing selected parameters about the
|
|
* machine
|
|
*/
|
|
static int API_get_sys_info(va_list ap)
|
|
{
|
|
struct sys_info *si;
|
|
|
|
si = (struct sys_info *)va_arg(ap, uintptr_t);
|
|
if (si == NULL)
|
|
return API_ENOMEM;
|
|
|
|
return (platform_sys_info(si)) ? 0 : API_ENODEV;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_udelay(unsigned long *udelay)
|
|
*/
|
|
static int API_udelay(va_list ap)
|
|
{
|
|
unsigned long *d;
|
|
|
|
if ((d = (unsigned long *)va_arg(ap, unsigned long)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
udelay(*d);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_get_timer(unsigned long *current, unsigned long *base)
|
|
*/
|
|
static int API_get_timer(va_list ap)
|
|
{
|
|
unsigned long *base, *cur;
|
|
|
|
cur = (unsigned long *)va_arg(ap, unsigned long);
|
|
if (cur == NULL)
|
|
return API_EINVAL;
|
|
|
|
base = (unsigned long *)va_arg(ap, unsigned long);
|
|
if (base == NULL)
|
|
return API_EINVAL;
|
|
|
|
*cur = get_timer(*base);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* pseudo signature:
|
|
*
|
|
* int API_dev_enum(struct device_info *)
|
|
*
|
|
*
|
|
* cookies uniqely identify the previously enumerated device instance and
|
|
* provide a hint for what to inspect in current enum iteration:
|
|
*
|
|
* - net: ð_device struct address from list pointed to by eth_devices
|
|
*
|
|
* - storage: struct blk_desc struct address from &ide_dev_desc[n],
|
|
* &scsi_dev_desc[n] and similar tables
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int API_dev_enum(va_list ap)
|
|
{
|
|
struct device_info *di;
|
|
|
|
/* arg is ptr to the device_info struct we are going to fill out */
|
|
di = (struct device_info *)va_arg(ap, uintptr_t);
|
|
if (di == NULL)
|
|
return API_EINVAL;
|
|
|
|
if (di->cookie == NULL) {
|
|
/* start over - clean up enumeration */
|
|
dev_enum_reset(); /* XXX shouldn't the name contain 'stor'? */
|
|
debugf("RESTART ENUM\n");
|
|
|
|
/* net device enumeration first */
|
|
if (dev_enum_net(di))
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* The hidden assumption is there can only be one active network
|
|
* device and it is identified upon enumeration (re)start, so there's
|
|
* no point in trying to find network devices in other cases than the
|
|
* (re)start and hence the 'next' device can only be storage
|
|
*/
|
|
if (!dev_enum_storage(di))
|
|
/* make sure we mark there are no more devices */
|
|
di->cookie = NULL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int API_dev_open(va_list ap)
|
|
{
|
|
struct device_info *di;
|
|
int err = 0;
|
|
|
|
/* arg is ptr to the device_info struct */
|
|
di = (struct device_info *)va_arg(ap, uintptr_t);
|
|
if (di == NULL)
|
|
return API_EINVAL;
|
|
|
|
/* Allow only one consumer of the device at a time */
|
|
if (di->state == DEV_STA_OPEN)
|
|
return API_EBUSY;
|
|
|
|
if (di->cookie == NULL)
|
|
return API_ENODEV;
|
|
|
|
if (di->type & DEV_TYP_STOR)
|
|
err = dev_open_stor(di->cookie);
|
|
|
|
else if (di->type & DEV_TYP_NET)
|
|
err = dev_open_net(di->cookie);
|
|
else
|
|
err = API_ENODEV;
|
|
|
|
if (!err)
|
|
di->state = DEV_STA_OPEN;
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
static int API_dev_close(va_list ap)
|
|
{
|
|
struct device_info *di;
|
|
int err = 0;
|
|
|
|
/* arg is ptr to the device_info struct */
|
|
di = (struct device_info *)va_arg(ap, uintptr_t);
|
|
if (di == NULL)
|
|
return API_EINVAL;
|
|
|
|
if (di->state == DEV_STA_CLOSED)
|
|
return 0;
|
|
|
|
if (di->cookie == NULL)
|
|
return API_ENODEV;
|
|
|
|
if (di->type & DEV_TYP_STOR)
|
|
err = dev_close_stor(di->cookie);
|
|
|
|
else if (di->type & DEV_TYP_NET)
|
|
err = dev_close_net(di->cookie);
|
|
else
|
|
/*
|
|
* In case of unknown device we cannot change its state, so
|
|
* only return error code
|
|
*/
|
|
err = API_ENODEV;
|
|
|
|
if (!err)
|
|
di->state = DEV_STA_CLOSED;
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* Notice: this is for sending network packets only, as U-Boot does not
|
|
* support writing to storage at the moment (12.2007)
|
|
*
|
|
* pseudo signature:
|
|
*
|
|
* int API_dev_write(
|
|
* struct device_info *di,
|
|
* void *buf,
|
|
* int *len
|
|
* )
|
|
*
|
|
* buf: ptr to buffer from where to get the data to send
|
|
*
|
|
* len: length of packet to be sent (in bytes)
|
|
*
|
|
*/
|
|
static int API_dev_write(va_list ap)
|
|
{
|
|
struct device_info *di;
|
|
void *buf;
|
|
int *len;
|
|
int err = 0;
|
|
|
|
/* 1. arg is ptr to the device_info struct */
|
|
di = (struct device_info *)va_arg(ap, uintptr_t);
|
|
if (di == NULL)
|
|
return API_EINVAL;
|
|
|
|
/* XXX should we check if device is open? i.e. the ->state ? */
|
|
|
|
if (di->cookie == NULL)
|
|
return API_ENODEV;
|
|
|
|
/* 2. arg is ptr to buffer from where to get data to write */
|
|
buf = (void *)va_arg(ap, uintptr_t);
|
|
if (buf == NULL)
|
|
return API_EINVAL;
|
|
|
|
/* 3. arg is length of buffer */
|
|
len = (int *)va_arg(ap, uintptr_t);
|
|
if (len == NULL)
|
|
return API_EINVAL;
|
|
if (*len <= 0)
|
|
return API_EINVAL;
|
|
|
|
if (di->type & DEV_TYP_STOR)
|
|
/*
|
|
* write to storage is currently not supported by U-Boot:
|
|
* no storage device implements block_write() method
|
|
*/
|
|
return API_ENODEV;
|
|
|
|
else if (di->type & DEV_TYP_NET)
|
|
err = dev_write_net(di->cookie, buf, *len);
|
|
else
|
|
err = API_ENODEV;
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_dev_read(
|
|
* struct device_info *di,
|
|
* void *buf,
|
|
* size_t *len,
|
|
* unsigned long *start
|
|
* size_t *act_len
|
|
* )
|
|
*
|
|
* buf: ptr to buffer where to put the read data
|
|
*
|
|
* len: ptr to length to be read
|
|
* - network: len of packet to read (in bytes)
|
|
* - storage: # of blocks to read (can vary in size depending on define)
|
|
*
|
|
* start: ptr to start block (only used for storage devices, ignored for
|
|
* network)
|
|
*
|
|
* act_len: ptr to where to put the len actually read
|
|
*/
|
|
static int API_dev_read(va_list ap)
|
|
{
|
|
struct device_info *di;
|
|
void *buf;
|
|
lbasize_t *len_stor, *act_len_stor;
|
|
lbastart_t *start;
|
|
int *len_net, *act_len_net;
|
|
|
|
/* 1. arg is ptr to the device_info struct */
|
|
di = (struct device_info *)va_arg(ap, uintptr_t);
|
|
if (di == NULL)
|
|
return API_EINVAL;
|
|
|
|
/* XXX should we check if device is open? i.e. the ->state ? */
|
|
|
|
if (di->cookie == NULL)
|
|
return API_ENODEV;
|
|
|
|
/* 2. arg is ptr to buffer from where to put the read data */
|
|
buf = (void *)va_arg(ap, uintptr_t);
|
|
if (buf == NULL)
|
|
return API_EINVAL;
|
|
|
|
if (di->type & DEV_TYP_STOR) {
|
|
/* 3. arg - ptr to var with # of blocks to read */
|
|
len_stor = (lbasize_t *)va_arg(ap, uintptr_t);
|
|
if (!len_stor)
|
|
return API_EINVAL;
|
|
if (*len_stor <= 0)
|
|
return API_EINVAL;
|
|
|
|
/* 4. arg - ptr to var with start block */
|
|
start = (lbastart_t *)va_arg(ap, uintptr_t);
|
|
|
|
/* 5. arg - ptr to var where to put the len actually read */
|
|
act_len_stor = (lbasize_t *)va_arg(ap, uintptr_t);
|
|
if (!act_len_stor)
|
|
return API_EINVAL;
|
|
|
|
*act_len_stor = dev_read_stor(di->cookie, buf, *len_stor, *start);
|
|
|
|
} else if (di->type & DEV_TYP_NET) {
|
|
|
|
/* 3. arg points to the var with length of packet to read */
|
|
len_net = (int *)va_arg(ap, uintptr_t);
|
|
if (!len_net)
|
|
return API_EINVAL;
|
|
if (*len_net <= 0)
|
|
return API_EINVAL;
|
|
|
|
/* 4. - ptr to var where to put the len actually read */
|
|
act_len_net = (int *)va_arg(ap, uintptr_t);
|
|
if (!act_len_net)
|
|
return API_EINVAL;
|
|
|
|
*act_len_net = dev_read_net(di->cookie, buf, *len_net);
|
|
|
|
} else
|
|
return API_ENODEV;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_env_get(const char *name, char **value)
|
|
*
|
|
* name: ptr to name of env var
|
|
*/
|
|
static int API_env_get(va_list ap)
|
|
{
|
|
char *name, **value;
|
|
|
|
if ((name = (char *)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
if ((value = (char **)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
*value = env_get(name);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_env_set(const char *name, const char *value)
|
|
*
|
|
* name: ptr to name of env var
|
|
*
|
|
* value: ptr to value to be set
|
|
*/
|
|
static int API_env_set(va_list ap)
|
|
{
|
|
char *name, *value;
|
|
|
|
if ((name = (char *)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
if ((value = (char *)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
env_set(name, value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_env_enum(const char *last, char **next)
|
|
*
|
|
* last: ptr to name of env var found in last iteration
|
|
*/
|
|
static int API_env_enum(va_list ap)
|
|
{
|
|
int i, buflen;
|
|
char *last, **next, *s;
|
|
ENTRY *match, search;
|
|
static char *var;
|
|
|
|
last = (char *)va_arg(ap, unsigned long);
|
|
|
|
if ((next = (char **)va_arg(ap, uintptr_t)) == NULL)
|
|
return API_EINVAL;
|
|
|
|
if (last == NULL) {
|
|
var = NULL;
|
|
i = 0;
|
|
} else {
|
|
var = strdup(last);
|
|
s = strchr(var, '=');
|
|
if (s != NULL)
|
|
*s = 0;
|
|
search.key = var;
|
|
i = hsearch_r(search, FIND, &match, &env_htab, 0);
|
|
if (i == 0) {
|
|
i = API_EINVAL;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* match the next entry after i */
|
|
i = hmatch_r("", i, &match, &env_htab);
|
|
if (i == 0)
|
|
goto done;
|
|
buflen = strlen(match->key) + strlen(match->data) + 2;
|
|
var = realloc(var, buflen);
|
|
snprintf(var, buflen, "%s=%s", match->key, match->data);
|
|
*next = var;
|
|
return 0;
|
|
|
|
done:
|
|
free(var);
|
|
var = NULL;
|
|
*next = NULL;
|
|
return i;
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_display_get_info(int type, struct display_info *di)
|
|
*/
|
|
static int API_display_get_info(va_list ap)
|
|
{
|
|
int type;
|
|
struct display_info *di;
|
|
|
|
type = va_arg(ap, int);
|
|
di = va_arg(ap, struct display_info *);
|
|
|
|
return display_get_info(type, di);
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* int API_display_draw_bitmap(ulong bitmap, int x, int y)
|
|
*/
|
|
static int API_display_draw_bitmap(va_list ap)
|
|
{
|
|
ulong bitmap;
|
|
int x, y;
|
|
|
|
bitmap = va_arg(ap, ulong);
|
|
x = va_arg(ap, int);
|
|
y = va_arg(ap, int);
|
|
|
|
return display_draw_bitmap(bitmap, x, y);
|
|
}
|
|
|
|
/*
|
|
* pseudo signature:
|
|
*
|
|
* void API_display_clear(void)
|
|
*/
|
|
static int API_display_clear(va_list ap)
|
|
{
|
|
display_clear();
|
|
return 0;
|
|
}
|
|
|
|
static cfp_t calls_table[API_MAXCALL] = { NULL, };
|
|
|
|
/*
|
|
* The main syscall entry point - this is not reentrant, only one call is
|
|
* serviced until finished.
|
|
*
|
|
* e.g. syscall(1, int *, u_int32_t, u_int32_t, u_int32_t, u_int32_t);
|
|
*
|
|
* call: syscall number
|
|
*
|
|
* retval: points to the return value placeholder, this is the place the
|
|
* syscall puts its return value, if NULL the caller does not
|
|
* expect a return value
|
|
*
|
|
* ... syscall arguments (variable number)
|
|
*
|
|
* returns: 0 if the call not found, 1 if serviced
|
|
*/
|
|
int syscall(int call, int *retval, ...)
|
|
{
|
|
va_list ap;
|
|
int rv;
|
|
|
|
if (call < 0 || call >= calls_no) {
|
|
debugf("invalid call #%d\n", call);
|
|
return 0;
|
|
}
|
|
|
|
if (calls_table[call] == NULL) {
|
|
debugf("syscall #%d does not have a handler\n", call);
|
|
return 0;
|
|
}
|
|
|
|
va_start(ap, retval);
|
|
rv = calls_table[call](ap);
|
|
if (retval != NULL)
|
|
*retval = rv;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void api_init(void)
|
|
{
|
|
struct api_signature *sig;
|
|
|
|
/* TODO put this into linker set one day... */
|
|
calls_table[API_RSVD] = NULL;
|
|
calls_table[API_GETC] = &API_getc;
|
|
calls_table[API_PUTC] = &API_putc;
|
|
calls_table[API_TSTC] = &API_tstc;
|
|
calls_table[API_PUTS] = &API_puts;
|
|
calls_table[API_RESET] = &API_reset;
|
|
calls_table[API_GET_SYS_INFO] = &API_get_sys_info;
|
|
calls_table[API_UDELAY] = &API_udelay;
|
|
calls_table[API_GET_TIMER] = &API_get_timer;
|
|
calls_table[API_DEV_ENUM] = &API_dev_enum;
|
|
calls_table[API_DEV_OPEN] = &API_dev_open;
|
|
calls_table[API_DEV_CLOSE] = &API_dev_close;
|
|
calls_table[API_DEV_READ] = &API_dev_read;
|
|
calls_table[API_DEV_WRITE] = &API_dev_write;
|
|
calls_table[API_ENV_GET] = &API_env_get;
|
|
calls_table[API_ENV_SET] = &API_env_set;
|
|
calls_table[API_ENV_ENUM] = &API_env_enum;
|
|
calls_table[API_DISPLAY_GET_INFO] = &API_display_get_info;
|
|
calls_table[API_DISPLAY_DRAW_BITMAP] = &API_display_draw_bitmap;
|
|
calls_table[API_DISPLAY_CLEAR] = &API_display_clear;
|
|
calls_no = API_MAXCALL;
|
|
|
|
debugf("API initialized with %d calls\n", calls_no);
|
|
|
|
dev_stor_init();
|
|
|
|
/*
|
|
* Produce the signature so the API consumers can find it
|
|
*/
|
|
sig = malloc(sizeof(struct api_signature));
|
|
if (sig == NULL) {
|
|
printf("API: could not allocate memory for the signature!\n");
|
|
return;
|
|
}
|
|
|
|
env_set_hex("api_address", (unsigned long)sig);
|
|
debugf("API sig @ 0x%lX\n", (unsigned long)sig);
|
|
memcpy(sig->magic, API_SIG_MAGIC, 8);
|
|
sig->version = API_SIG_VERSION;
|
|
sig->syscall = &syscall;
|
|
sig->checksum = 0;
|
|
sig->checksum = crc32(0, (unsigned char *)sig,
|
|
sizeof(struct api_signature));
|
|
debugf("syscall entry: 0x%lX\n", (unsigned long)sig->syscall);
|
|
}
|
|
|
|
void platform_set_mr(struct sys_info *si, unsigned long start, unsigned long size,
|
|
int flags)
|
|
{
|
|
int i;
|
|
|
|
if (!si->mr || !size || (flags == 0))
|
|
return;
|
|
|
|
/* find free slot */
|
|
for (i = 0; i < si->mr_no; i++)
|
|
if (si->mr[i].flags == 0) {
|
|
/* insert new mem region */
|
|
si->mr[i].start = start;
|
|
si->mr[i].size = size;
|
|
si->mr[i].flags = flags;
|
|
return;
|
|
}
|
|
}
|