Properly map memory through map_sysmem so that pxe can be used from the sandbox.
Tested in sandbox as well as on jetson-tk1, odroid-xu3, snow as peach-pi boards
Signed-off-by: Sjoerd Simons sjoerd.simons@collabora.co.uk
---
Changes in v2: - Prevent uncessary casts - Always unmap mapped sysmem - Consistently use base variable to refer to unmapped memory - Various coding style fixes
common/cmd_pxe.c | 86 ++++++++++++++++++++++++++++++++++++-------------------- 1 file changed, 56 insertions(+), 30 deletions(-)
diff --git a/common/cmd_pxe.c b/common/cmd_pxe.c index 7e32c95..292f2c1 100644 --- a/common/cmd_pxe.c +++ b/common/cmd_pxe.c @@ -13,6 +13,7 @@ #include <errno.h> #include <linux/list.h> #include <fs.h> +#include <asm/io.h>
#include "menu.h" #include "cli.h" @@ -188,11 +189,12 @@ static int do_get_any(cmd_tbl_t *cmdtp, const char *file_path, char *file_addr) * * Returns 1 for success, or < 0 on error. */ -static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr) +static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path, + unsigned long file_addr) { size_t path_len; char relfile[MAX_TFTP_PATH_LEN+1]; - char addr_buf[10]; + char addr_buf[18]; int err;
err = get_bootfile_path(file_path, relfile, sizeof(relfile)); @@ -215,7 +217,7 @@ static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr)
printf("Retrieving file: %s\n", relfile);
- sprintf(addr_buf, "%p", file_addr); + sprintf(addr_buf, "%lx", file_addr);
return do_getfile(cmdtp, relfile, addr_buf); } @@ -227,11 +229,13 @@ static int get_relfile(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr) * * Returns 1 on success, or < 0 for error. */ -static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr) +static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, + unsigned long file_addr) { unsigned long config_file_size; char *tftp_filesize; int err; + char *buf;
err = get_relfile(cmdtp, file_path, file_addr);
@@ -250,7 +254,9 @@ static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr if (strict_strtoul(tftp_filesize, 16, &config_file_size) < 0) return -EINVAL;
- *(char *)(file_addr + config_file_size) = '\0'; + buf = map_sysmem(file_addr + config_file_size, 1); + *buf = '\0'; + unmap_sysmem(buf);
return 1; } @@ -266,7 +272,8 @@ static int get_pxe_file(cmd_tbl_t *cmdtp, const char *file_path, void *file_addr * * Returns 1 on success or < 0 on error. */ -static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file, void *pxefile_addr_r) +static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file, + unsigned long pxefile_addr_r) { size_t base_len = strlen(PXELINUX_DIR); char path[MAX_TFTP_PATH_LEN+1]; @@ -287,7 +294,7 @@ static int get_pxelinux_path(cmd_tbl_t *cmdtp, const char *file, void *pxefile_a * * Returns 1 on success or < 0 on error. */ -static int pxe_uuid_path(cmd_tbl_t *cmdtp, void *pxefile_addr_r) +static int pxe_uuid_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) { char *uuid_str;
@@ -305,7 +312,7 @@ static int pxe_uuid_path(cmd_tbl_t *cmdtp, void *pxefile_addr_r) * * Returns 1 on success or < 0 on error. */ -static int pxe_mac_path(cmd_tbl_t *cmdtp, void *pxefile_addr_r) +static int pxe_mac_path(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) { char mac_str[21]; int err; @@ -325,7 +332,7 @@ static int pxe_mac_path(cmd_tbl_t *cmdtp, void *pxefile_addr_r) * * Returns 1 on success or < 0 on error. */ -static int pxe_ipaddr_paths(cmd_tbl_t *cmdtp, void *pxefile_addr_r) +static int pxe_ipaddr_paths(cmd_tbl_t *cmdtp, unsigned long pxefile_addr_r) { char ip_addr[9]; int mask_pos, err; @@ -384,9 +391,9 @@ do_pxe_get(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) * Keep trying paths until we successfully get a file we're looking * for. */ - if (pxe_uuid_path(cmdtp, (void *)pxefile_addr_r) > 0 || - pxe_mac_path(cmdtp, (void *)pxefile_addr_r) > 0 || - pxe_ipaddr_paths(cmdtp, (void *)pxefile_addr_r) > 0) { + if (pxe_uuid_path(cmdtp, pxefile_addr_r) > 0 || + pxe_mac_path(cmdtp, pxefile_addr_r) > 0 || + pxe_ipaddr_paths(cmdtp, pxefile_addr_r) > 0) { printf("Config file found\n");
return 0; @@ -394,7 +401,7 @@ do_pxe_get(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
while (pxe_default_paths[i]) { if (get_pxelinux_path(cmdtp, pxe_default_paths[i], - (void *)pxefile_addr_r) > 0) { + pxefile_addr_r) > 0) { printf("Config file found\n"); return 0; } @@ -427,7 +434,7 @@ static int get_relfile_envaddr(cmd_tbl_t *cmdtp, const char *file_path, const ch if (strict_strtoul(envaddr, 16, &file_addr) < 0) return -EINVAL;
- return get_relfile(cmdtp, file_path, (void *)file_addr); + return get_relfile(cmdtp, file_path, file_addr); }
/* @@ -790,6 +797,7 @@ static int label_boot(cmd_tbl_t *cmdtp, struct pxe_label *label) else do_bootz(cmdtp, 0, bootm_argc, bootm_argv); #endif + unmap_sysmem(buf); return 1; }
@@ -1054,7 +1062,8 @@ static int parse_integer(char **c, int *dst) return 1; }
-static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, struct pxe_menu *cfg, int nest_level); +static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base, + struct pxe_menu *cfg, int nest_level);
/* * Parse an include statement, and retrieve and parse the file it mentions. @@ -1064,12 +1073,14 @@ static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, struct pxe_menu *cfg, in * include, nest_level has already been incremented and doesn't need to be * incremented here. */ -static int handle_include(cmd_tbl_t *cmdtp, char **c, char *base, +static int handle_include(cmd_tbl_t *cmdtp, char **c, unsigned long base, struct pxe_menu *cfg, int nest_level) { char *include_path; char *s = *c; int err; + char *buf; + int ret;
err = parse_sliteral(c, &include_path);
@@ -1086,20 +1097,25 @@ static int handle_include(cmd_tbl_t *cmdtp, char **c, char *base, return err; }
- return parse_pxefile_top(cmdtp, base, cfg, nest_level); + buf = map_sysmem(base, 0); + ret = parse_pxefile_top(cmdtp, buf, base, cfg, nest_level); + unmap_sysmem(buf); + + return ret; }
/* * Parse lines that begin with 'menu'. * - * b and nest are provided to handle the 'menu include' case. + * base and nest are provided to handle the 'menu include' case. * - * b should be the address where the file currently being parsed is stored. + * base should point to a location where it's safe to store the included file. * * nest_level should be 1 when parsing the top level pxe file, 2 when parsing * a file it includes, 3 when parsing a file included by that file, and so on. */ -static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg, char *b, int nest_level) +static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg, + unsigned long base, int nest_level) { struct token t; char *s = *c; @@ -1114,7 +1130,7 @@ static int parse_menu(cmd_tbl_t *cmdtp, char **c, struct pxe_menu *cfg, char *b, break;
case T_INCLUDE: - err = handle_include(cmdtp, c, b + strlen(b) + 1, cfg, + err = handle_include(cmdtp, c, base, cfg, nest_level + 1); break;
@@ -1281,7 +1297,8 @@ static int parse_label(char **c, struct pxe_menu *cfg) * * Returns 1 on success, < 0 on error. */ -static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, struct pxe_menu *cfg, int nest_level) +static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, unsigned long base, + struct pxe_menu *cfg, int nest_level) { struct token t; char *s, *b, *label_name; @@ -1303,7 +1320,9 @@ static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, struct pxe_menu *cfg, in switch (t.type) { case T_MENU: cfg->prompt = 1; - err = parse_menu(cmdtp, &p, cfg, b, nest_level); + err = parse_menu(cmdtp, &p, cfg, + base + ALIGN(strlen(b) + 1, 4), + nest_level); break;
case T_TIMEOUT: @@ -1328,8 +1347,9 @@ static int parse_pxefile_top(cmd_tbl_t *cmdtp, char *p, struct pxe_menu *cfg, in break;
case T_INCLUDE: - err = handle_include(cmdtp, &p, b + ALIGN(strlen(b), 4), cfg, - nest_level + 1); + err = handle_include(cmdtp, &p, + base + ALIGN(strlen(b), 4), cfg, + nest_level + 1); break;
case T_PROMPT: @@ -1385,9 +1405,11 @@ static void destroy_pxe_menu(struct pxe_menu *cfg) * files it includes). The resulting pxe_menu struct can be free()'d by using * the destroy_pxe_menu() function. */ -static struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, char *menucfg) +static struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, unsigned long menucfg) { struct pxe_menu *cfg; + char *buf; + int r;
cfg = malloc(sizeof(struct pxe_menu));
@@ -1398,7 +1420,11 @@ static struct pxe_menu *parse_pxefile(cmd_tbl_t *cmdtp, char *menucfg)
INIT_LIST_HEAD(&cfg->labels);
- if (parse_pxefile_top(cmdtp, menucfg, cfg, 1) < 0) { + buf = map_sysmem(menucfg, 0); + r = parse_pxefile_top(cmdtp, buf, menucfg, cfg, 1); + unmap_sysmem(buf); + + if (r < 0) { destroy_pxe_menu(cfg); return NULL; } @@ -1556,7 +1582,7 @@ do_pxe_boot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 1; }
- cfg = parse_pxefile(cmdtp, (char *)(pxefile_addr_r)); + cfg = parse_pxefile(cmdtp, pxefile_addr_r);
if (cfg == NULL) { printf("Error parsing config file\n"); @@ -1663,12 +1689,12 @@ static int do_sysboot(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) return 1; }
- if (get_pxe_file(cmdtp, filename, (void *)pxefile_addr_r) < 0) { + if (get_pxe_file(cmdtp, filename, pxefile_addr_r) < 0) { printf("Error reading config file\n"); return 1; }
- cfg = parse_pxefile(cmdtp, (char *)(pxefile_addr_r)); + cfg = parse_pxefile(cmdtp, pxefile_addr_r);
if (cfg == NULL) { printf("Error parsing config file\n");