diff options
| author | Kevin Cernekee <cernekee@gmail.com> | 2014-10-20 21:27:56 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2014-11-24 07:45:10 +0100 |
| commit | 3677a283621446805044a73a36b3539a0b41bc12 (patch) | |
| tree | c6d68cd283eba3fa6b8441d22819989dade134e6 /arch/mips/kernel/smp-bmips.c | |
| parent | 230b6ff57552c23a03e1b8d3f4a401261ca981c7 (diff) | |
MIPS: BMIPS: Explicitly configure reset vectors prior to secondary boot
The secondary CPU's reset vector needs to be set to KSEG1 for a cold
boot (release from reset), or KSEG0 for a warm restart. On a cold boot
KSEG0 may be unavailable (BMIPS4380), and on a warm restart KSEG1 may
be unavailable (XKS01 mode on 4380 or 5000).
Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
Cc: f.fainelli@gmail.com
Cc: mbizon@freebox.fr
Cc: jogo@openwrt.org
Cc: jfraser@broadcom.com
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8161/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/smp-bmips.c')
| -rw-r--r-- | arch/mips/kernel/smp-bmips.c | 29 |
1 files changed, 8 insertions, 21 deletions
diff --git a/arch/mips/kernel/smp-bmips.c b/arch/mips/kernel/smp-bmips.c index f7b1beef7790..162391d548b5 100644 --- a/arch/mips/kernel/smp-bmips.c +++ b/arch/mips/kernel/smp-bmips.c @@ -47,6 +47,8 @@ cpumask_t bmips_booted_mask; #define RESET_FROM_KSEG0 0x80080800 #define RESET_FROM_KSEG1 0xa0080800 +static void bmips_set_reset_vec(int cpu, u32 val); + #ifdef CONFIG_SMP /* initial $sp, $gp - used by arch/mips/kernel/bmips_vec.S */ @@ -198,6 +200,9 @@ static void bmips_boot_secondary(int cpu, struct task_struct *idle) pr_info("SMP: Booting CPU%d...\n", cpu); if (cpumask_test_cpu(cpu, &bmips_booted_mask)) { + /* kseg1 might not exist if this CPU enabled XKS01 */ + bmips_set_reset_vec(cpu, RESET_FROM_KSEG0); + switch (current_cpu_type()) { case CPU_BMIPS4350: case CPU_BMIPS4380: @@ -207,8 +212,9 @@ static void bmips_boot_secondary(int cpu, struct task_struct *idle) bmips5000_send_ipi_single(cpu, 0); break; } - } - else { + } else { + bmips_set_reset_vec(cpu, RESET_FROM_KSEG1); + switch (current_cpu_type()) { case CPU_BMIPS4350: case CPU_BMIPS4380: @@ -229,31 +235,12 @@ static void bmips_boot_secondary(int cpu, struct task_struct *idle) */ static void bmips_init_secondary(void) { - /* move NMI vector to kseg0, in case XKS01 is enabled */ - - void __iomem *cbr; - unsigned long old_vec; - unsigned long relo_vector; - int boot_cpu; - switch (current_cpu_type()) { case CPU_BMIPS4350: case CPU_BMIPS4380: - cbr = BMIPS_GET_CBR(); - - boot_cpu = !!(read_c0_brcm_cmt_local() & (1 << 31)); - relo_vector = boot_cpu ? BMIPS_RELO_VECTOR_CONTROL_0 : - BMIPS_RELO_VECTOR_CONTROL_1; - - old_vec = __raw_readl(cbr + relo_vector); - __raw_writel(old_vec & ~0x20000000, cbr + relo_vector); - clear_c0_cause(smp_processor_id() ? C_SW1 : C_SW0); break; case CPU_BMIPS5000: - write_c0_brcm_bootvec(read_c0_brcm_bootvec() & - (smp_processor_id() & 0x01 ? ~0x20000000 : ~0x2000)); - write_c0_brcm_action(ACTION_CLR_IPI(smp_processor_id(), 0)); break; } |