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author | Wolfgang Denk <wd@denx.de> | 2008-01-09 22:06:15 (GMT) |
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committer | Wolfgang Denk <wd@denx.de> | 2008-01-09 22:06:15 (GMT) |
commit | ecc198c9b9522aa766235b7780f8ef7e01d0d0e2 (patch) | |
tree | 66c8d0f5456decaa19ba8ba61df2c100a4b0efc5 /api_examples/glue.c | |
parent | cc557950f742fe18003638963e267d52036159ce (diff) | |
parent | 500856eb1707ed17d9204baa61dd59948d3b2899 (diff) | |
download | u-boot-fsl-qoriq-ecc198c9b9522aa766235b7780f8ef7e01d0d0e2.tar.xz |
Merge branch 'master' of git://www.denx.de/git/u-boot-freebsd
Diffstat (limited to 'api_examples/glue.c')
-rw-r--r-- | api_examples/glue.c | 405 |
1 files changed, 405 insertions, 0 deletions
diff --git a/api_examples/glue.c b/api_examples/glue.c new file mode 100644 index 0000000..7598369 --- /dev/null +++ b/api_examples/glue.c @@ -0,0 +1,405 @@ +/* + * (C) Copyright 2007 Semihalf + * + * Written by: Rafal Jaworowski <raj@semihalf.com> + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + */ + +#include <common.h> +#include <linux/types.h> +#include <api_public.h> + +#include "glue.h" + +static int valid_sig(struct api_signature *sig) +{ + uint32_t checksum; + struct api_signature s; + + if (sig == NULL) + return 0; + /* + * Clear the checksum field (in the local copy) so as to calculate the + * CRC with the same initial contents as at the time when the sig was + * produced + */ + s = *sig; + s.checksum = 0; + + checksum = crc32(0, (unsigned char *)&s, sizeof(struct api_signature)); + + if (checksum != sig->checksum) + return 0; + + return 1; +} + +/* + * Searches for the U-Boot API signature + * + * returns 1/0 depending on found/not found result + */ +int api_search_sig(struct api_signature **sig) { + + unsigned char *sp; + + if (sig == NULL) + return 0; + + sp = (unsigned char *)API_SEARCH_START; + + while ((sp + (int)API_SIG_MAGLEN) < (unsigned char *)API_SEARCH_END) { + if (!memcmp(sp, API_SIG_MAGIC, API_SIG_MAGLEN)) { + *sig = (struct api_signature *)sp; + if (valid_sig(*sig)) + return 1; + } + sp += API_SIG_MAGLEN; + } + + *sig = NULL; + return 0; +} + +/**************************************** + * + * console + * + ****************************************/ + +int ub_getc(void) +{ + int c; + + if (!syscall(API_GETC, NULL, (uint32_t)&c)) + return -1; + + return c; +} + +int ub_tstc(void) +{ + int t; + + if (!syscall(API_TSTC, NULL, (uint32_t)&t)) + return -1; + + return t; +} + +void ub_putc(char c) +{ + syscall(API_PUTC, NULL, (uint32_t)&c); +} + +void ub_puts(const char *s) +{ + syscall(API_PUTS, NULL, (uint32_t)s); +} + +/**************************************** + * + * system + * + ****************************************/ + +void ub_reset(void) +{ + syscall(API_RESET, NULL); +} + +#define MR_MAX 5 +static struct mem_region mr[MR_MAX]; +static struct sys_info si; + +struct sys_info * ub_get_sys_info(void) +{ + int err = 0; + + memset(&si, 0, sizeof(struct sys_info)); + si.mr = mr; + si.mr_no = MR_MAX; + memset(&mr, 0, sizeof(mr)); + + if (!syscall(API_GET_SYS_INFO, &err, (u_int32_t)&si)) + return NULL; + + return ((err) ? NULL : &si); +} + +/**************************************** + * + * timing + * + ****************************************/ + +void ub_udelay(unsigned long usec) +{ + syscall(API_UDELAY, NULL, &usec); +} + +unsigned long ub_get_timer(unsigned long base) +{ + unsigned long cur; + + if (!syscall(API_GET_TIMER, NULL, &cur, &base)) + return 0; + + return cur; +} + + +/**************************************************************************** + * + * devices + * + * Devices are identified by handles: numbers 0, 1, 2, ..., MAX_DEVS-1 + * + ***************************************************************************/ + +#define MAX_DEVS 6 + +static struct device_info devices[MAX_DEVS]; + +struct device_info * ub_dev_get(int i) +{ + return ((i < 0 || i >= MAX_DEVS) ? NULL : &devices[i]); +} + +/* + * Enumerates the devices: fills out device_info elements in the devices[] + * array. + * + * returns: number of devices found + */ +int ub_dev_enum(void) +{ + struct device_info *di; + int n = 0; + + memset(&devices, 0, sizeof(struct device_info) * MAX_DEVS); + di = &devices[0]; + + if (!syscall(API_DEV_ENUM, NULL, di)) + return 0; + + while (di->cookie != NULL) { + + if (++n >= MAX_DEVS) + break; + + /* take another device_info */ + di++; + + /* pass on the previous cookie */ + di->cookie = devices[n - 1].cookie; + + if (!syscall(API_DEV_ENUM, NULL, di)) + return 0; + } + + return n; +} + +/* + * handle: 0-based id of the device + * + * returns: 0 when OK, err otherwise + */ +int ub_dev_open(int handle) +{ + struct device_info *di; + int err = 0; + + if (handle < 0 || handle >= MAX_DEVS) + return API_EINVAL; + + di = &devices[handle]; + + if (!syscall(API_DEV_OPEN, &err, di)) + return -1; + + return err; +} + +int ub_dev_close(int handle) +{ + struct device_info *di; + + if (handle < 0 || handle >= MAX_DEVS) + return API_EINVAL; + + di = &devices[handle]; + if (!syscall(API_DEV_CLOSE, NULL, di)) + return -1; + + return 0; +} + +/* + * + * Validates device for read/write, it has to: + * + * - have sane handle + * - be opened + * + * returns: 0/1 accordingly + */ +static int dev_valid(int handle) +{ + if (handle < 0 || handle >= MAX_DEVS) + return 0; + + if (devices[handle].state != DEV_STA_OPEN) + return 0; + + return 1; +} + +static int dev_stor_valid(int handle) +{ + if (!dev_valid(handle)) + return 0; + + if (!(devices[handle].type & DEV_TYP_STOR)) + return 0; + + return 1; +} + +int ub_dev_read(int handle, void *buf, lbasize_t len, lbastart_t start) +{ + struct device_info *di; + lbasize_t act_len; + int err = 0; + + if (!dev_stor_valid(handle)) + return API_ENODEV; + + di = &devices[handle]; + if (!syscall(API_DEV_READ, &err, di, buf, &len, &start, &act_len)) + return -1; + + if (err) + return err; + + if (act_len != len) + return API_EIO; + + return 0; +} + +static int dev_net_valid(int handle) +{ + if (!dev_valid(handle)) + return 0; + + if (devices[handle].type != DEV_TYP_NET) + return 0; + + return 1; +} + +int ub_dev_recv(int handle, void *buf, int len) +{ + struct device_info *di; + int err = 0, act_len; + + if (!dev_net_valid(handle)) + return API_ENODEV; + + di = &devices[handle]; + if (!syscall(API_DEV_READ, &err, di, buf, &len, &act_len)) + return -1; + + if (err) + return -1; + + return act_len; +} + +int ub_dev_send(int handle, void *buf, int len) +{ + struct device_info *di; + int err = 0; + + if (!dev_net_valid(handle)) + return API_ENODEV; + + di = &devices[handle]; + if (!syscall(API_DEV_WRITE, &err, di, buf, &len)) + return -1; + + return err; +} + +/**************************************** + * + * env vars + * + ****************************************/ + +char * ub_env_get(const char *name) +{ + char *value; + + if (!syscall(API_ENV_GET, NULL, (uint32_t)name, (uint32_t)&value)) + return NULL; + + return value; +} + +void ub_env_set(const char *name, char *value) +{ + syscall(API_ENV_SET, NULL, (uint32_t)name, (uint32_t)value); +} + + +static char env_name[256]; + +const char * ub_env_enum(const char *last) +{ + const char *env, *str; + int i; + + env = NULL; + + /* + * It's OK to pass only the name piece as last (and not the whole + * 'name=val' string), since the API_ENUM_ENV call uses envmatch() + * internally, which handles such case + */ + if (!syscall(API_ENV_ENUM, NULL, (uint32_t)last, (uint32_t)&env)) + return NULL; + + if (!env) + /* no more env. variables to enumerate */ + return NULL; + + /* next enumerated env var */ + memset(env_name, 0, 256); + for (i = 0, str = env; *str != '=' && *str != '\0';) + env_name[i++] = *str++; + + env_name[i] = '\0'; + + return env_name; +} |