--- /dev/null
+/*
+ * (C) Copyright 2007-2008 Semihalf, Rafal Jaworowski <raj@semihalf.com>
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#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;
+ uint32_t search_start = 0;
+ uint32_t search_end = 0;
+
+ if (sig == NULL)
+ return 0;
+
+ if (search_hint == 0)
+ search_hint = 255 * 1024 * 1024;
+
+ search_start = search_hint & ~0x000fffff;
+ search_end = search_start + API_SEARCH_LEN - API_SIG_MAGLEN;
+
+ sp = (unsigned char *)search_start;
+ while ((sp + API_SIG_MAGLEN) < (unsigned char *)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);
+}
+
+static struct mem_region mr[UB_MAX_MR];
+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 = UB_MAX_MR;
+ 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, ..., UB_MAX_DEV-1
+ *
+ ***************************************************************************/
+
+static struct device_info devices[UB_MAX_DEV];
+
+struct device_info * ub_dev_get(int i)
+{
+ return ((i < 0 || i >= UB_MAX_DEV) ? 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) * UB_MAX_DEV);
+ di = &devices[0];
+
+ if (!syscall(API_DEV_ENUM, NULL, di))
+ return 0;
+
+ while (di->cookie != NULL) {
+
+ if (++n >= UB_MAX_DEV)
+ 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 >= UB_MAX_DEV)
+ 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 >= UB_MAX_DEV)
+ 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 >= UB_MAX_DEV)
+ 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,
+ lbasize_t *rlen)
+{
+ 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 API_ESYSC;
+
+ if (!err && rlen)
+ *rlen = act_len;
+
+ return err;
+}
+
+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, int *rlen)
+{
+ 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 API_ESYSC;
+
+ if (!err && rlen)
+ *rlen = act_len;
+
+ return (err);
+}
+
+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 API_ESYSC;
+
+ 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;
+}
+
+/****************************************
+ *
+ * display
+ *
+ ****************************************/
+
+int ub_display_get_info(int type, struct display_info *di)
+{
+ int err = 0;
+
+ if (!syscall(API_DISPLAY_GET_INFO, &err, (uint32_t)type, (uint32_t)di))
+ return API_ESYSC;
+
+ return err;
+}
+
+int ub_display_draw_bitmap(ulong bitmap, int x, int y)
+{
+ int err = 0;
+
+ if (!syscall(API_DISPLAY_DRAW_BITMAP, &err, bitmap, x, y))
+ return API_ESYSC;
+
+ return err;
+}
+
+void ub_display_clear(void)
+{
+ syscall(API_DISPLAY_CLEAR, NULL);
+}
Code Review / kvmfornfv.git / blobdiff