#include "ddr.h"
+/*
+ * Use our own stack based buffer before relocation to allow accessing longer
+ * hwconfig strings that might be in the environment before we've relocated.
+ * This is pretty fragile on both the use of stack and if the buffer is big
+ * enough. However we will get a warning from getenv_f for the later.
+ */
+#define HWCONFIG_BUFFER_SIZE 128
+
/* Board-specific functions defined in each board's ddr.c */
extern void fsl_ddr_board_options(memctl_options_t *popts,
dimm_params_t *pdimm,
unsigned int ctrl_num)
{
unsigned int i;
+ char buffer[HWCONFIG_BUFFER_SIZE];
+ char *buf = NULL;
+
+ /*
+ * Extract hwconfig from environment since we have not properly setup
+ * the environment but need it for ddr config params
+ */
+ if (getenv_f("hwconfig", buffer, sizeof(buffer)) > 0)
+ buf = buffer;
/* Chip select options. */
* should be a subset of the requested configuration.
*/
#if (CONFIG_NUM_DDR_CONTROLLERS > 1)
- if (hwconfig_sub("fsl_ddr", "ctlr_intlv")) {
+ if (hwconfig_sub_f("fsl_ddr", "ctlr_intlv", buf)) {
if (pdimm[0].n_ranks == 0) {
printf("There is no rank on CS0 for controller %d. Because only"
" rank on CS0 and ranks chip-select interleaved with CS0"
* test null first. if CONFIG_HWCONFIG is not defined
* hwconfig_arg_cmp returns non-zero
*/
- if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "null")) {
+ if (hwconfig_subarg_cmp_f("fsl_ddr", "ctlr_intlv",
+ "null", buf)) {
popts->memctl_interleaving = 0;
debug("memory controller interleaving disabled.\n");
- } else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "cacheline"))
+ } else if (hwconfig_subarg_cmp_f("fsl_ddr",
+ "ctlr_intlv",
+ "cacheline", buf))
popts->memctl_interleaving_mode =
FSL_DDR_CACHE_LINE_INTERLEAVING;
- else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "page"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "ctlr_intlv",
+ "page", buf))
popts->memctl_interleaving_mode =
FSL_DDR_PAGE_INTERLEAVING;
- else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "bank"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "ctlr_intlv",
+ "bank", buf))
popts->memctl_interleaving_mode =
FSL_DDR_BANK_INTERLEAVING;
- else if (hwconfig_subarg_cmp("fsl_ddr", "ctlr_intlv", "superbank"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "ctlr_intlv",
+ "superbank", buf))
popts->memctl_interleaving_mode =
FSL_DDR_SUPERBANK_INTERLEAVING;
else {
}
}
#endif
- if ((hwconfig_sub("fsl_ddr", "bank_intlv")) &&
+ if ((hwconfig_sub_f("fsl_ddr", "bank_intlv", buf)) &&
(CONFIG_CHIP_SELECTS_PER_CTRL > 1)) {
/* test null first. if CONFIG_HWCONFIG is not defined,
- * hwconfig_arg_cmp returns non-zero */
- if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "null"))
+ * hwconfig_subarg_cmp_f returns non-zero */
+ if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
+ "null", buf))
debug("bank interleaving disabled.\n");
- else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
+ "cs0_cs1", buf))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1;
- else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs2_cs3"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
+ "cs2_cs3", buf))
popts->ba_intlv_ctl = FSL_DDR_CS2_CS3;
- else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1_and_cs2_cs3"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
+ "cs0_cs1_and_cs2_cs3", buf))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_AND_CS2_CS3;
- else if (hwconfig_subarg_cmp("fsl_ddr", "bank_intlv", "cs0_cs1_cs2_cs3"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "bank_intlv",
+ "cs0_cs1_cs2_cs3", buf))
popts->ba_intlv_ctl = FSL_DDR_CS0_CS1_CS2_CS3;
else
printf("hwconfig has unrecognized parameter for bank_intlv.\n");
}
}
- if (hwconfig_sub("fsl_ddr", "addr_hash")) {
- if (hwconfig_subarg_cmp("fsl_ddr", "addr_hash", "null"))
+ if (hwconfig_sub_f("fsl_ddr", "addr_hash", buf)) {
+ if (hwconfig_subarg_cmp_f("fsl_ddr", "addr_hash", "null", buf))
popts->addr_hash = 0;
- else if (hwconfig_subarg_cmp("fsl_ddr", "addr_hash", "true"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "addr_hash",
+ "true", buf))
popts->addr_hash = 1;
}
int use_spd = 0;
#ifdef CONFIG_DDR_SPD
+ char buffer[HWCONFIG_BUFFER_SIZE];
+ char *buf = NULL;
+
+ /*
+ * Extract hwconfig from environment since we have not properly setup
+ * the environment but need it for ddr config params
+ */
+ if (getenv_f("hwconfig", buffer, sizeof(buffer)) > 0)
+ buf = buffer;
+
/* if hwconfig is not enabled, or "sdram" is not defined, use spd */
- if (hwconfig_sub("fsl_ddr", "sdram")) {
- if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "spd"))
+ if (hwconfig_sub_f("fsl_ddr", "sdram", buf)) {
+ if (hwconfig_subarg_cmp_f("fsl_ddr", "sdram", "spd", buf))
use_spd = 1;
- else if (hwconfig_subarg_cmp("fsl_ddr", "sdram", "fixed"))
+ else if (hwconfig_subarg_cmp_f("fsl_ddr", "sdram",
+ "fixed", buf))
use_spd = 0;
else
use_spd = 1;
* An inteface for configuring a hardware via u-boot environment.
*
* Copyright (c) 2009 MontaVista Software, Inc.
+ * Copyright 2011 Freescale Semiconductor, Inc.
*
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
const char cpu_hwconfig[] __attribute__((weak)) = "";
const char board_hwconfig[] __attribute__((weak)) = "";
-#define HWCONFIG_PRE_RELOC_BUF_SIZE 128
-
-static const char *__hwconfig(const char *opt, size_t *arglen)
+static const char *__hwconfig(const char *opt, size_t *arglen,
+ const char *env_hwconfig)
{
- const char *env_hwconfig = NULL, *ret;
- char buf[HWCONFIG_PRE_RELOC_BUF_SIZE];
+ const char *ret;
- if (gd->flags & GD_FLG_ENV_READY) {
+ /* if we are passed a buffer use it, otherwise try the environment */
+ if (!env_hwconfig) {
+ if (!(gd->flags & GD_FLG_ENV_READY)) {
+ printf("WARNING: Calling __hwconfig without a buffer "
+ "and before environment is ready\n");
+ return NULL;
+ }
env_hwconfig = getenv("hwconfig");
- } else {
- /*
- * Use our own on stack based buffer before relocation to allow
- * accessing longer hwconfig strings that might be in the
- * environment before we've relocated. This is pretty fragile
- * on both the use of stack and if the buffer is big enough.
- * However we will get a warning from getenv_f for the later.
- */
- if ((getenv_f("hwconfig", buf, sizeof(buf))) > 0)
- env_hwconfig = buf;
}
if (env_hwconfig) {
}
/*
- * hwconfig - query if a particular hwconfig option is specified
+ * hwconfig_f - query if a particular hwconfig option is specified
* @opt: a string representing an option
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
* This call can be used to find out whether U-Boot should configure
* a particular hardware option.
* that the board file only calls things that are actually used, so
* hwconfig() will always return true result.
*/
-int hwconfig(const char *opt)
+int hwconfig_f(const char *opt, char *buf)
{
- return !!__hwconfig(opt, NULL);
+ return !!__hwconfig(opt, NULL, buf);
}
/*
- * hwconfig_arg - get hwconfig option's argument
+ * hwconfig_arg_f - get hwconfig option's argument
* @opt: a string representing an option
* @arglen: a pointer to an allocated size_t variable
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * Unlike hwconfig() function, this function returns a pointer to the
+ * Unlike hwconfig_f() function, this function returns a pointer to the
* start of the hwconfig arguments, if option is not found or it has
* no specified arguments, the function returns NULL pointer.
*
* If CONFIG_HWCONFIG is undefined, the function returns "", and
* arglen is set to 0.
*/
-const char *hwconfig_arg(const char *opt, size_t *arglen)
+const char *hwconfig_arg_f(const char *opt, size_t *arglen, char *buf)
{
- return __hwconfig(opt, arglen);
+ return __hwconfig(opt, arglen, buf);
}
/*
- * hwconfig_arg_cmp - compare hwconfig option's argument
+ * hwconfig_arg_cmp_f - compare hwconfig option's argument
* @opt: a string representing an option
* @arg: a string for comparing an option's argument
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig_arg, but instead of returning
+ * This call is similar to hwconfig_arg_f, but instead of returning
* hwconfig argument and its length, it is comparing it to @arg.
*
* Returns non-zero value if @arg matches, 0 otherwise.
* If CONFIG_HWCONFIG is undefined, the function returns a non-zero
* value, i.e. the argument matches.
*/
-int hwconfig_arg_cmp(const char *opt, const char *arg)
+int hwconfig_arg_cmp_f(const char *opt, const char *arg, char *buf)
{
const char *argstr;
size_t arglen;
- argstr = hwconfig_arg(opt, &arglen);
+ argstr = hwconfig_arg_f(opt, &arglen, buf);
if (!argstr || arglen != strlen(arg))
return 0;
}
/*
- * hwconfig_sub - query if a particular hwconfig sub-option is specified
+ * hwconfig_sub_f - query if a particular hwconfig sub-option is specified
* @opt: a string representing an option
* @subopt: a string representing a sub-option
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig(), except that it takes additional
+ * This call is similar to hwconfig_f(), except that it takes additional
* argument @subopt. In this example:
* "dr_usb:mode=peripheral"
* "dr_usb" is an option, "mode" is a sub-option, and "peripheral" is its
* argument.
*/
-int hwconfig_sub(const char *opt, const char *subopt)
+int hwconfig_sub_f(const char *opt, const char *subopt, char *buf)
{
size_t arglen;
const char *arg;
- arg = __hwconfig(opt, &arglen);
+ arg = __hwconfig(opt, &arglen, buf);
if (!arg)
return 0;
return !!hwconfig_parse(arg, arglen, subopt, ",;", '=', NULL);
}
/*
- * hwconfig_subarg - get hwconfig sub-option's argument
+ * hwconfig_subarg_f - get hwconfig sub-option's argument
* @opt: a string representing an option
* @subopt: a string representing a sub-option
* @subarglen: a pointer to an allocated size_t variable
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig_arg(), except that it takes an additional
- * argument @subopt, and so works with sub-options.
+ * This call is similar to hwconfig_arg_f(), except that it takes an
+ * additional argument @subopt, and so works with sub-options.
*/
-const char *hwconfig_subarg(const char *opt, const char *subopt,
- size_t *subarglen)
+const char *hwconfig_subarg_f(const char *opt, const char *subopt,
+ size_t *subarglen, char *buf)
{
size_t arglen;
const char *arg;
- arg = __hwconfig(opt, &arglen);
+ arg = __hwconfig(opt, &arglen, buf);
if (!arg)
return NULL;
return hwconfig_parse(arg, arglen, subopt, ",;", '=', subarglen);
}
/*
- * hwconfig_arg_cmp - compare hwconfig sub-option's argument
+ * hwconfig_arg_cmp_f - compare hwconfig sub-option's argument
* @opt: a string representing an option
* @subopt: a string representing a sub-option
* @subarg: a string for comparing an sub-option's argument
+ * @buf: if non-NULL use this buffer to parse, otherwise try env
*
- * This call is similar to hwconfig_arg_cmp, except that it takes an additional
- * argument @subopt, and so works with sub-options.
+ * This call is similar to hwconfig_arg_cmp_f, except that it takes an
+ * additional argument @subopt, and so works with sub-options.
*/
-int hwconfig_subarg_cmp(const char *opt, const char *subopt, const char *subarg)
+int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
+ const char *subarg, char *buf)
{
const char *argstr;
size_t arglen;
- argstr = hwconfig_subarg(opt, subopt, &arglen);
+ argstr = hwconfig_subarg_f(opt, subopt, &arglen, buf);
if (!argstr || arglen != strlen(subarg))
return 0;
* An inteface for configuring a hardware via u-boot environment.
*
* Copyright (c) 2009 MontaVista Software, Inc.
+ * Copyright 2011 Freescale Semiconductor, Inc.
*
* Author: Anton Vorontsov <avorontsov@ru.mvista.com>
*
#ifdef CONFIG_HWCONFIG
-extern int hwconfig(const char *opt);
-extern const char *hwconfig_arg(const char *opt, size_t *arglen);
-extern int hwconfig_arg_cmp(const char *opt, const char *arg);
-extern int hwconfig_sub(const char *opt, const char *subopt);
-extern const char *hwconfig_subarg(const char *opt, const char *subopt,
- size_t *subarglen);
-extern int hwconfig_subarg_cmp(const char *opt, const char *subopt,
- const char *subarg);
-
+extern int hwconfig_f(const char *opt, char *buf);
+extern const char *hwconfig_arg_f(const char *opt, size_t *arglen, char *buf);
+extern int hwconfig_arg_cmp_f(const char *opt, const char *arg, char *buf);
+extern int hwconfig_sub_f(const char *opt, const char *subopt, char *buf);
+extern const char *hwconfig_subarg_f(const char *opt, const char *subopt,
+ size_t *subarglen, char *buf);
+extern int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
+ const char *subarg, char *buf);
#else
-static inline int hwconfig(const char *opt)
+static inline int hwconfig_f(const char *opt, char *buf)
{
return -ENOSYS;
}
-static inline const char *hwconfig_arg(const char *opt, size_t *arglen)
+static inline const char *hwconfig_arg_f(const char *opt, size_t *arglen,
+ char *buf)
{
*arglen = 0;
return "";
}
-static inline int hwconfig_arg_cmp(const char *opt, const char *arg)
+static inline int hwconfig_arg_cmp_f(const char *opt, const char *arg,
+ char *buf)
{
return -ENOSYS;
}
-static inline int hwconfig_sub(const char *opt, const char *subopt)
+static inline int hwconfig_sub_f(const char *opt, const char *subopt, char *buf)
{
return -ENOSYS;
}
-static inline const char *hwconfig_subarg(const char *opt, const char *subopt,
- size_t *subarglen)
+static inline const char *hwconfig_subarg_f(const char *opt, const char *subopt,
+ size_t *subarglen, char *buf)
{
*subarglen = 0;
return "";
}
-static inline int hwconfig_subarg_cmp(const char *opt, const char *subopt,
- const char *subarg)
+static inline int hwconfig_subarg_cmp_f(const char *opt, const char *subopt,
+ const char *subarg, char *buf)
{
return -ENOSYS;
}
#endif /* CONFIG_HWCONFIG */
+static inline int hwconfig(const char *opt)
+{
+ return hwconfig_f(opt, NULL);
+}
+
+static inline const char *hwconfig_arg(const char *opt, size_t *arglen)
+{
+ return hwconfig_arg_f(opt, arglen, NULL);
+}
+
+static inline int hwconfig_arg_cmp(const char *opt, const char *arg)
+{
+ return hwconfig_arg_cmp_f(opt, arg, NULL);
+}
+
+static inline int hwconfig_sub(const char *opt, const char *subopt)
+{
+ return hwconfig_sub_f(opt, subopt, NULL);
+}
+
+static inline const char *hwconfig_subarg(const char *opt, const char *subopt,
+ size_t *subarglen)
+{
+ return hwconfig_subarg_f(opt, subopt, subarglen, NULL);
+}
+
+static inline int hwconfig_subarg_cmp(const char *opt, const char *subopt,
+ const char *subarg)
+{
+ return hwconfig_subarg_cmp_f(opt, subopt, subarg, NULL);
+}
+
#endif /* _HWCONFIG_H */
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