openbcm

Git mirror of https://github.com/Broadcom-Network-Switching-Software/OpenBCM
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boot.c (2468B)

      1 /*
      2  * 
      3  * This license is set out in https://raw.githubusercontent.com/Broadcom-Network-Switching-Software/OpenBCM/master/Legal/LICENSE file.
      4  * 
      5  * Copyright 2007-2019 Broadcom Inc. All rights reserved.
      6  *
      7  * File: 	boot.c
      8  * Purpose:	Kernel initialization
      9  */
     10 
     11 #include <stdio.h>
     12 #include <stdlib.h>
     13 
     14 
     15 #include <soc/debug.h>
     16 
     17 
     18 
     19 #include <sal/core/libc.h>
     20 #include <sal/core/boot.h>
     21 #include <sal/core/spl.h>
     22 #include <sal/core/dpc.h>
     23 #include <sal/core/sync.h>
     24 
     25 /*
     26  * Function:
     27  *	sal_core_init
     28  * Purpose:
     29  *	Initialize the Kernel SAL
     30  * Returns:
     31  *	0 on success, -1 on failure
     32  */
     33 
     34 int
     35 sal_core_init(void)
     36 {    
     37     sal_udelay(0);	/* Cause sal_udelay() to self-calibrate */
     38 
     39     sal_thread_main_set(sal_thread_self());
     40 
     41     if (sal_spl_init()) {
     42         return -1;
     43     }
     44 
     45     if (sal_dpc_init()) {
     46         return -1;
     47     }
     48 
     49     if (sal_global_lock_init()) {
     50         return -1;
     51     }
     52 
     53     return 0;
     54 }
     55 
     56 /*
     57  * Function:
     58  *	sal_boot_flags_get
     59  * Purpose:
     60  *	Return boot flags from startup
     61  *	Flags are set for PLISIM and NO_PROBE by default, and can be
     62  *	overridden by setting the environment variable SOC_BOOT_FLAGS.
     63  * Parameters:
     64  *	None
     65  * Returns:
     66  *	32-bit flags value, 0 if not supported or no flags set.
     67  */
     68 
     69 static int	_sal_boot_flags_init = FALSE;
     70 static uint32	_sal_boot_flags = 0;
     71 
     72 uint32
     73 sal_boot_flags_get(void)
     74 {
     75     if (!_sal_boot_flags_init) {
     76 	char *s = getenv("SOC_BOOT_FLAGS");
     77 	if (s == NULL) {
     78 #ifdef PLISIM
     79 	    _sal_boot_flags = (BOOT_F_PLISIM | BOOT_F_NO_PROBE);
     80 #ifdef LINUX_PLI_COMBO_BDE
     81             if (getenv("BCM_SIM_PATH") == NULL) {
     82                 _sal_boot_flags = 0;
     83             }
     84 #endif
     85 #endif
     86 	} else {
     87 	    _sal_boot_flags = sal_ctoi(s, NULL);
     88 	}
     89 	_sal_boot_flags_init = TRUE;
     90     }
     91 
     92     return _sal_boot_flags;
     93 }
     94 
     95 /*
     96  * Function:
     97  *	sal_boot_flags_set
     98  * Purpose:
     99  *	Change boot flags
    100  * Parameters:
    101  *	flags - New boot flags
    102  */
    103 
    104 void
    105 sal_boot_flags_set(uint32 flags)
    106 {
    107     _sal_boot_flags_init = TRUE;
    108     _sal_boot_flags = flags;
    109 }
    110 
    111 /*
    112  * Function:
    113  *	sal_boot_script
    114  * Purpose:
    115  *	Return name of boot script from startup
    116  * Parameters:
    117  *	None
    118  * Returns:
    119  *	Name of boot script, NULL if none
    120  */
    121 char *
    122 sal_boot_script(void)
    123 {
    124     return getenv("SOC_BOOT_SCRIPT");
    125 }
    126 
    127 
    128 /*
    129  * Function:
    130  *      sal_os_name
    131  * Purpose:
    132  *      Provide a description of the underlying operating system
    133  * Parameters:
    134  *      None
    135  * Returns:
    136  *      String describing the OS
    137  */
    138 const char* 
    139 sal_os_name(void)
    140 {
    141     return "Unix (Posix)"; 
    142 }