From ed96762e3241f57aa812977cf1920d3ee0363f4d Mon Sep 17 00:00:00 2001 From: Nicolas Pitre Date: Thu, 5 Jul 2012 21:33:26 -0400 Subject: ARM: bL_switcher: do not hardcode GIC IDs in the code Currently, GIC IDs are hardcoded making the code dependent on the 4+4 b.L configuration. Let's allow for GIC IDs to be discovered upon switcher initialization to support other b.L configurations such as the 1+1 one, or 2+3 as on the VExpress TC2. Signed-off-by: Nicolas Pitre --- arch/arm/common/bL_switcher.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'arch/arm/common/bL_switcher.c') diff --git a/arch/arm/common/bL_switcher.c b/arch/arm/common/bL_switcher.c index 50e95d894e3..1c2e5bcfb1f 100644 --- a/arch/arm/common/bL_switcher.c +++ b/arch/arm/common/bL_switcher.c @@ -110,6 +110,8 @@ static int bL_switchpoint(unsigned long _arg) * Generic switcher interface */ +static unsigned int bL_gic_id[MAX_CPUS_PER_CLUSTER][MAX_NR_CLUSTERS]; + /* * bL_switch_to - Switch to a specific cluster for the current CPU * @new_cluster_id: the ID of the cluster to switch to. @@ -159,7 +161,7 @@ static int bL_switch_to(unsigned int new_cluster_id) this_cpu = smp_processor_id(); /* redirect GIC's SGIs to our counterpart */ - gic_migrate_target(cpuid + ib_cluster*4); + gic_migrate_target(bL_gic_id[cpuid][ib_cluster]); /* * Raise a SGI on the inbound CPU to make sure it doesn't stall @@ -332,6 +334,16 @@ static int __init bL_switcher_halve_cpus(void) cluster = (cpu_logical_map(i) >> 8) & 0xff; if (cpumask_test_cpu(cpu, &common_mask)) { + /* Let's take note of the GIC ID for this CPU */ + int gic_id = gic_get_cpu_id(i); + if (gic_id < 0) { + pr_err("%s: bad GIC ID for CPU %d\n", __func__, i); + return -EINVAL; + } + bL_gic_id[cpu][cluster] = gic_id; + pr_info("GIC ID for CPU %u cluster %u is %u\n", + cpu, cluster, gic_id); + /* * We keep only those logical CPUs which number * is equal to their physical CPU number. This is -- cgit v1.2.3-70-g09d2