diff options
Diffstat (limited to 'arch/xtensa/kernel/setup.c')
| -rw-r--r-- | arch/xtensa/kernel/setup.c | 137 |
1 files changed, 8 insertions, 129 deletions
diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index 32cdc2c52e98..8fd4be610607 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -31,10 +31,6 @@ # include <linux/console.h> #endif -#ifdef CONFIG_RTC -# include <linux/timex.h> -#endif - #ifdef CONFIG_PROC_FS # include <linux/seq_file.h> #endif @@ -48,24 +44,22 @@ #include <asm/page.h> #include <asm/setup.h> #include <asm/param.h> -#include <asm/traps.h> #include <asm/smp.h> #include <asm/sysmem.h> #include <platform/hardware.h> #if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) -struct screen_info screen_info = { 0, 24, 0, 0, 0, 80, 0, 0, 0, 24, 1, 16}; -#endif - -#ifdef CONFIG_BLK_DEV_FD -extern struct fd_ops no_fd_ops; -struct fd_ops *fd_ops; +struct screen_info screen_info = { + .orig_x = 0, + .orig_y = 24, + .orig_video_cols = 80, + .orig_video_lines = 24, + .orig_video_isVGA = 1, + .orig_video_points = 16, +}; #endif -extern struct rtc_ops no_rtc_ops; -struct rtc_ops *rtc_ops; - #ifdef CONFIG_BLK_DEV_INITRD extern unsigned long initrd_start; extern unsigned long initrd_end; @@ -77,7 +71,6 @@ extern int initrd_below_start_ok; void *dtb_start = __dtb_start; #endif -unsigned char aux_device_present; extern unsigned long loops_per_jiffy; /* Command line specified as configuration option. */ @@ -317,120 +310,6 @@ extern char _SecondaryResetVector_text_start; extern char _SecondaryResetVector_text_end; #endif - -#ifdef CONFIG_S32C1I_SELFTEST -#if XCHAL_HAVE_S32C1I - -static int __initdata rcw_word, rcw_probe_pc, rcw_exc; - -/* - * Basic atomic compare-and-swap, that records PC of S32C1I for probing. - * - * If *v == cmp, set *v = set. Return previous *v. - */ -static inline int probed_compare_swap(int *v, int cmp, int set) -{ - int tmp; - - __asm__ __volatile__( - " movi %1, 1f\n" - " s32i %1, %4, 0\n" - " wsr %2, scompare1\n" - "1: s32c1i %0, %3, 0\n" - : "=a" (set), "=&a" (tmp) - : "a" (cmp), "a" (v), "a" (&rcw_probe_pc), "0" (set) - : "memory" - ); - return set; -} - -/* Handle probed exception */ - -static void __init do_probed_exception(struct pt_regs *regs, - unsigned long exccause) -{ - if (regs->pc == rcw_probe_pc) { /* exception on s32c1i ? */ - regs->pc += 3; /* skip the s32c1i instruction */ - rcw_exc = exccause; - } else { - do_unhandled(regs, exccause); - } -} - -/* Simple test of S32C1I (soc bringup assist) */ - -static int __init check_s32c1i(void) -{ - int n, cause1, cause2; - void *handbus, *handdata, *handaddr; /* temporarily saved handlers */ - - rcw_probe_pc = 0; - handbus = trap_set_handler(EXCCAUSE_LOAD_STORE_ERROR, - do_probed_exception); - handdata = trap_set_handler(EXCCAUSE_LOAD_STORE_DATA_ERROR, - do_probed_exception); - handaddr = trap_set_handler(EXCCAUSE_LOAD_STORE_ADDR_ERROR, - do_probed_exception); - - /* First try an S32C1I that does not store: */ - rcw_exc = 0; - rcw_word = 1; - n = probed_compare_swap(&rcw_word, 0, 2); - cause1 = rcw_exc; - - /* took exception? */ - if (cause1 != 0) { - /* unclean exception? */ - if (n != 2 || rcw_word != 1) - panic("S32C1I exception error"); - } else if (rcw_word != 1 || n != 1) { - panic("S32C1I compare error"); - } - - /* Then an S32C1I that stores: */ - rcw_exc = 0; - rcw_word = 0x1234567; - n = probed_compare_swap(&rcw_word, 0x1234567, 0xabcde); - cause2 = rcw_exc; - - if (cause2 != 0) { - /* unclean exception? */ - if (n != 0xabcde || rcw_word != 0x1234567) - panic("S32C1I exception error (b)"); - } else if (rcw_word != 0xabcde || n != 0x1234567) { - panic("S32C1I store error"); - } - - /* Verify consistency of exceptions: */ - if (cause1 || cause2) { - pr_warn("S32C1I took exception %d, %d\n", cause1, cause2); - /* If emulation of S32C1I upon bus error gets implemented, - we can get rid of this panic for single core (not SMP) */ - panic("S32C1I exceptions not currently supported"); - } - if (cause1 != cause2) - panic("inconsistent S32C1I exceptions"); - - trap_set_handler(EXCCAUSE_LOAD_STORE_ERROR, handbus); - trap_set_handler(EXCCAUSE_LOAD_STORE_DATA_ERROR, handdata); - trap_set_handler(EXCCAUSE_LOAD_STORE_ADDR_ERROR, handaddr); - return 0; -} - -#else /* XCHAL_HAVE_S32C1I */ - -/* This condition should not occur with a commercially deployed processor. - Display reminder for early engr test or demo chips / FPGA bitstreams */ -static int __init check_s32c1i(void) -{ - pr_warn("Processor configuration lacks atomic compare-and-swap support!\n"); - return 0; -} - -#endif /* XCHAL_HAVE_S32C1I */ -early_initcall(check_s32c1i); -#endif /* CONFIG_S32C1I_SELFTEST */ - static inline int mem_reserve(unsigned long start, unsigned long end) { return memblock_reserve(start, end - start); |