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| author | Paul Burton <paul.burton@mips.com> | 2019-04-30 22:53:31 +0000 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-05-02 11:21:08 -0700 |
| commit | de56d4c1da3e68f0ca468a55f6677bef3cee6e10 (patch) | |
| tree | eb50e182e0c6b03f6aae143ed7ee6fe0fabed21f /arch/mips/kernel/traps.c | |
| parent | 783454e2bc7ce491b5cd50154433cde993bfd849 (diff) | |
| download | linux-de56d4c1da3e68f0ca468a55f6677bef3cee6e10.tar.bz2 | |
MIPS: Remove duplicate EBase configuration
Clean up our configuration of the EBase register by making
configure_exception_vector() write to it unconditionally on systems
implementing MIPSr2 or higher, and removing the duplicate code in
per_cpu_trap_init(). The latter would have duplicated work on systems
with vectored interrupts, and didn't set BEV for safety like the
configure_exception_vector() version of the code does.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
Tested-by: Serge Semin <fancer.lancer@gmail.com>
Cc: linux-mips@vger.kernel.org
Diffstat (limited to 'arch/mips/kernel/traps.c')
| -rw-r--r-- | arch/mips/kernel/traps.c | 20 |
1 files changed, 3 insertions, 17 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 2775190adbe7..c52766a5b85f 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -2151,7 +2151,7 @@ static void configure_hwrena(void) static void configure_exception_vector(void) { - if (cpu_has_veic || cpu_has_vint) { + if (cpu_has_mips_r2_r6) { unsigned long sr = set_c0_status(ST0_BEV); /* If available, use WG to set top bits of EBASE */ if (cpu_has_ebase_wg) { @@ -2163,6 +2163,8 @@ static void configure_exception_vector(void) } write_c0_ebase(ebase); write_c0_status(sr); + } + if (cpu_has_veic || cpu_has_vint) { /* Setting vector spacing enables EI/VI mode */ change_c0_intctl(0x3e0, VECTORSPACING); } @@ -2193,22 +2195,6 @@ void per_cpu_trap_init(bool is_boot_cpu) * o read IntCtl.IPFDC to determine the fast debug channel interrupt */ if (cpu_has_mips_r2_r6) { - /* - * We shouldn't trust a secondary core has a sane EBASE register - * so use the one calculated by the boot CPU. - */ - if (!is_boot_cpu) { - /* If available, use WG to set top bits of EBASE */ - if (cpu_has_ebase_wg) { -#ifdef CONFIG_64BIT - write_c0_ebase_64(ebase | MIPS_EBASE_WG); -#else - write_c0_ebase(ebase | MIPS_EBASE_WG); -#endif - } - write_c0_ebase(ebase); - } - cp0_compare_irq_shift = CAUSEB_TI - CAUSEB_IP; cp0_compare_irq = (read_c0_intctl() >> INTCTLB_IPTI) & 7; cp0_perfcount_irq = (read_c0_intctl() >> INTCTLB_IPPCI) & 7; |