#include <asm/cacheflush.h>
#include <asm/traps.h>
#include <asm/mips-boards/generic.h>
-#include <asm/mips-boards/prom.h>
-
-extern void prom_init_early_console(char port);
+#include <asm/fw/fw.h>
extern char except_vec_nmi;
extern char except_vec_ejtag_debug;
-int prom_argc;
-int *_prom_argv, *_prom_envp;
-
-#define prom_envp(index) ((char *)(long)_prom_envp[(index)])
-
-char *prom_getenv(char *envname)
+#ifdef CONFIG_SERIAL_8250_CONSOLE
+static void __init console_config(void)
{
- /*
- * Return a pointer to the given environment variable.
- * In 64-bit mode: we're using 64-bit pointers, but all pointers
- * in the PROM structures are only 32-bit, so we need some
- * workarounds, if we are running in 64-bit mode.
- */
- int i, index = 0;
-
- i = strlen(envname);
-
- while (prom_envp(index)) {
- if (strncmp(envname, prom_envp(index), i) == 0)
- return prom_envp(index+1);
- index += 2;
+ char console_string[40];
+ int baud = 0;
+ char parity = '\0', bits = '\0', flow = '\0';
+ char *s;
+
+ if ((strstr(fw_getcmdline(), "console=")) == NULL) {
+ s = fw_getenv("modetty0");
+ if (s) {
+ while (*s >= '0' && *s <= '9')
+ baud = baud*10 + *s++ - '0';
+ if (*s == ',')
+ s++;
+ if (*s)
+ parity = *s++;
+ if (*s == ',')
+ s++;
+ if (*s)
+ bits = *s++;
+ if (*s == ',')
+ s++;
+ if (*s == 'h')
+ flow = 'r';
+ }
+ if (baud == 0)
+ baud = 38400;
+ if (parity != 'n' && parity != 'o' && parity != 'e')
+ parity = 'n';
+ if (bits != '7' && bits != '8')
+ bits = '8';
+ if (flow == '\0')
+ flow = 'r';
+ sprintf(console_string, " console=ttyS0,%d%c%c%c", baud,
+ parity, bits, flow);
+ strcat(fw_getcmdline(), console_string);
}
-
- return NULL;
}
+#endif
static void __init mips_nmi_setup(void)
{
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa80) :
(void *)(CAC_BASE + 0x380);
+#ifdef CONFIG_CPU_MICROMIPS
+ /*
+ * Decrement the exception vector address by one for microMIPS.
+ */
+ memcpy(base, (&except_vec_nmi - 1), 0x80);
+
+ /*
+ * This is a hack. We do not know if the boot loader was built with
+ * microMIPS instructions or not. If it was not, the NMI exception
+ * code at 0x80000a80 will be taken in MIPS32 mode. The hand coded
+ * assembly below forces us into microMIPS mode if we are a pure
+ * microMIPS kernel. The assembly instructions are:
+ *
+ * 3C1A8000 lui k0,0x8000
+ * 375A0381 ori k0,k0,0x381
+ * 03400008 jr k0
+ * 00000000 nop
+ *
+ * The mode switch occurs by jumping to the unaligned exception
+ * vector address at 0x80000381 which would have been 0x80000380
+ * in MIPS32 mode. The jump to the unaligned address transitions
+ * us into microMIPS mode.
+ */
+ if (!cpu_has_veic) {
+ void *base2 = (void *)(CAC_BASE + 0xa80);
+ *((unsigned int *)base2) = 0x3c1a8000;
+ *((unsigned int *)base2 + 1) = 0x375a0381;
+ *((unsigned int *)base2 + 2) = 0x03400008;
+ *((unsigned int *)base2 + 3) = 0x00000000;
+ flush_icache_range((unsigned long)base2,
+ (unsigned long)base2 + 0x10);
+ }
+#else
memcpy(base, &except_vec_nmi, 0x80);
+#endif
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
base = cpu_has_veic ?
(void *)(CAC_BASE + 0xa00) :
(void *)(CAC_BASE + 0x300);
+#ifdef CONFIG_CPU_MICROMIPS
+ /* Deja vu... */
+ memcpy(base, (&except_vec_ejtag_debug - 1), 0x80);
+ if (!cpu_has_veic) {
+ void *base2 = (void *)(CAC_BASE + 0xa00);
+ *((unsigned int *)base2) = 0x3c1a8000;
+ *((unsigned int *)base2 + 1) = 0x375a0301;
+ *((unsigned int *)base2 + 2) = 0x03400008;
+ *((unsigned int *)base2 + 3) = 0x00000000;
+ flush_icache_range((unsigned long)base2,
+ (unsigned long)base2 + 0x10);
+ }
+#else
memcpy(base, &except_vec_ejtag_debug, 0x80);
+#endif
flush_icache_range((unsigned long)base, (unsigned long)base + 0x80);
}
void __init prom_init(void)
{
- prom_argc = fw_arg0;
- _prom_argv = (int *) fw_arg1;
- _prom_envp = (int *) fw_arg2;
-
board_nmi_handler_setup = mips_nmi_setup;
board_ejtag_handler_setup = mips_ejtag_setup;
- prom_init_cmdline();
+ fw_init_cmdline();
#ifdef CONFIG_EARLY_PRINTK
- if ((strstr(prom_getcmdline(), "console=ttyS0")) != NULL)
- prom_init_early_console(0);
- else if ((strstr(prom_getcmdline(), "console=ttyS1")) != NULL)
- prom_init_early_console(1);
+ if ((strstr(fw_getcmdline(), "console=ttyS0")) != NULL)
+ fw_init_early_console(0);
+ else if ((strstr(fw_getcmdline(), "console=ttyS1")) != NULL)
+ fw_init_early_console(1);
#endif
#ifdef CONFIG_SERIAL_8250_CONSOLE
- if ((strstr(prom_getcmdline(), "console=")) == NULL)
- strcat(prom_getcmdline(), " console=ttyS0,38400n8r");
+ if ((strstr(fw_getcmdline(), "console=")) == NULL)
+ strcat(fw_getcmdline(), " console=ttyS0,38400n8r");
+ console_config();
#endif
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff