[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen master] xen: arm: move smp_init_cpus to smpboot.c
commit 1eb47fdc02a9ed1317210d319c1bd4ffc614006a Author: Ian Campbell <ian.campbell@xxxxxxxxxx> AuthorDate: Fri Sep 27 10:30:29 2013 +0100 Commit: Ian Campbell <ian.campbell@xxxxxxxxxx> CommitDate: Fri Sep 27 16:49:52 2013 +0100 xen: arm: move smp_init_cpus to smpboot.c Seems like a better home. Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx> Acked-by: Julien Grall <julien.grall@xxxxxxxxxx> --- xen/arch/arm/setup.c | 125 -------------------------------------------- xen/arch/arm/smpboot.c | 126 +++++++++++++++++++++++++++++++++++++++++++++ xen/include/asm-arm/smp.h | 1 + 3 files changed, 127 insertions(+), 125 deletions(-) diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index b2c4101..49f344c 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -588,131 +588,6 @@ void __init setup_cache(void) cacheline_bytes = 1U << (4 + (ccsid & 0x7)); } -/* Parse the device tree and build the logical map array containing - * MPIDR values related to logical cpus - * Code base on Linux arch/arm/kernel/devtree.c - */ -static void __init smp_init_cpus(void) -{ - register_t mpidr; - struct dt_device_node *cpus = dt_find_node_by_path("/cpus"); - struct dt_device_node *cpu; - unsigned int i, j; - unsigned int cpuidx = 1; - static u32 tmp_map[NR_CPUS] __initdata = - { - [0 ... NR_CPUS - 1] = MPIDR_INVALID - }; - bool_t bootcpu_valid = 0; - int rc; - - if ( (rc = arch_smp_init()) < 0 ) - { - printk(XENLOG_WARNING "SMP init failed (%d)\n" - "Using only 1 CPU\n", rc); - return; - } - - mpidr = boot_cpu_data.mpidr.bits & MPIDR_HWID_MASK; - - if ( !cpus ) - { - printk(XENLOG_WARNING "WARNING: Can't find /cpus in the device tree.\n" - "Using only 1 CPU\n"); - return; - } - - dt_for_each_child_node( cpus, cpu ) - { - u32 hwid; - - if ( !dt_device_type_is_equal(cpu, "cpu") ) - continue; - - if ( !dt_property_read_u32(cpu, "reg", &hwid) ) - { - printk(XENLOG_WARNING "cpu node `%s`: missing reg property\n", - dt_node_full_name(cpu)); - continue; - } - - /* - * 8 MSBs must be set to 0 in the DT since the reg property - * defines the MPIDR[23:0] - */ - if ( hwid & ~MPIDR_HWID_MASK ) - { - printk(XENLOG_WARNING "cpu node `%s`: invalid hwid value (0x%x)\n", - dt_node_full_name(cpu), hwid); - continue; - } - - /* - * Duplicate MPIDRs are a recipe for disaster. Scan all initialized - * entries and check for duplicates. If any found just skip the node. - * temp values values are initialized to MPIDR_INVALID to avoid - * matching valid MPIDR[23:0] values. - */ - for ( j = 0; j < cpuidx; j++ ) - { - if ( tmp_map[j] == hwid ) - { - printk(XENLOG_WARNING "cpu node `%s`: duplicate /cpu reg properties in the DT\n", - dt_node_full_name(cpu)); - continue; - } - } - - /* - * Build a stashed array of MPIDR values. Numbering scheme requires - * that if detected the boot CPU must be assigned logical id 0. Other - * CPUs get sequential indexes starting from 1. If a CPU node - * with a reg property matching the boot CPU MPIDR is detected, - * this is recorded and so that the logical map build from DT is - * validated and can be used to set the map. - */ - if ( hwid == mpidr ) - { - i = 0; - bootcpu_valid = 1; - } - else - i = cpuidx++; - - if ( cpuidx > NR_CPUS ) - { - printk(XENLOG_WARNING - "DT /cpu %u node greater than max cores %u, capping them\n", - cpuidx, NR_CPUS); - cpuidx = NR_CPUS; - break; - } - - if ( (rc = arch_cpu_init(i, cpu)) < 0 ) - { - printk("cpu%d init failed (hwid %x): %d\n", i, hwid, rc); - tmp_map[i] = MPIDR_INVALID; - } - else - tmp_map[i] = hwid; - } - - if ( !bootcpu_valid ) - { - printk(XENLOG_WARNING "DT missing boot CPU MPIDR[23:0]\n" - "Using only 1 CPU\n"); - return; - } - - for ( i = 0; i < cpuidx; i++ ) - { - if ( tmp_map[i] == MPIDR_INVALID ) - continue; - cpumask_set_cpu(i, &cpu_possible_map); - cpu_logical_map(i) = tmp_map[i]; - } -} - /* C entry point for boot CPU */ void __init start_xen(unsigned long boot_phys_offset, unsigned long fdt_paddr, diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c index 2cb0f36..b836be4 100644 --- a/xen/arch/arm/smpboot.c +++ b/xen/arch/arm/smpboot.c @@ -89,6 +89,132 @@ smp_clear_cpu_maps (void) cpu_logical_map(0) = READ_SYSREG(MPIDR_EL1) & MPIDR_HWID_MASK; } +/* Parse the device tree and build the logical map array containing + * MPIDR values related to logical cpus + * Code base on Linux arch/arm/kernel/devtree.c + */ +void __init smp_init_cpus(void) +{ + register_t mpidr; + struct dt_device_node *cpus = dt_find_node_by_path("/cpus"); + struct dt_device_node *cpu; + unsigned int i, j; + unsigned int cpuidx = 1; + static u32 tmp_map[NR_CPUS] __initdata = + { + [0 ... NR_CPUS - 1] = MPIDR_INVALID + }; + bool_t bootcpu_valid = 0; + int rc; + + if ( (rc = arch_smp_init()) < 0 ) + { + printk(XENLOG_WARNING "SMP init failed (%d)\n" + "Using only 1 CPU\n", rc); + return; + } + + mpidr = boot_cpu_data.mpidr.bits & MPIDR_HWID_MASK; + + if ( !cpus ) + { + printk(XENLOG_WARNING "WARNING: Can't find /cpus in the device tree.\n" + "Using only 1 CPU\n"); + return; + } + + dt_for_each_child_node( cpus, cpu ) + { + u32 hwid; + + if ( !dt_device_type_is_equal(cpu, "cpu") ) + continue; + + if ( !dt_property_read_u32(cpu, "reg", &hwid) ) + { + printk(XENLOG_WARNING "cpu node `%s`: missing reg property\n", + dt_node_full_name(cpu)); + continue; + } + + /* + * 8 MSBs must be set to 0 in the DT since the reg property + * defines the MPIDR[23:0] + */ + if ( hwid & ~MPIDR_HWID_MASK ) + { + printk(XENLOG_WARNING "cpu node `%s`: invalid hwid value (0x%x)\n", + dt_node_full_name(cpu), hwid); + continue; + } + + /* + * Duplicate MPIDRs are a recipe for disaster. Scan all initialized + * entries and check for duplicates. If any found just skip the node. + * temp values values are initialized to MPIDR_INVALID to avoid + * matching valid MPIDR[23:0] values. + */ + for ( j = 0; j < cpuidx; j++ ) + { + if ( tmp_map[j] == hwid ) + { + printk(XENLOG_WARNING + "cpu node `%s`: duplicate /cpu reg properties in the DT\n", + dt_node_full_name(cpu)); + continue; + } + } + + /* + * Build a stashed array of MPIDR values. Numbering scheme requires + * that if detected the boot CPU must be assigned logical id 0. Other + * CPUs get sequential indexes starting from 1. If a CPU node + * with a reg property matching the boot CPU MPIDR is detected, + * this is recorded and so that the logical map build from DT is + * validated and can be used to set the map. + */ + if ( hwid == mpidr ) + { + i = 0; + bootcpu_valid = 1; + } + else + i = cpuidx++; + + if ( cpuidx > NR_CPUS ) + { + printk(XENLOG_WARNING + "DT /cpu %u node greater than max cores %u, capping them\n", + cpuidx, NR_CPUS); + cpuidx = NR_CPUS; + break; + } + + if ( (rc = arch_cpu_init(i, cpu)) < 0 ) + { + printk("cpu%d init failed (hwid %x): %d\n", i, hwid, rc); + tmp_map[i] = MPIDR_INVALID; + } + else + tmp_map[i] = hwid; + } + + if ( !bootcpu_valid ) + { + printk(XENLOG_WARNING "DT missing boot CPU MPIDR[23:0]\n" + "Using only 1 CPU\n"); + return; + } + + for ( i = 0; i < cpuidx; i++ ) + { + if ( tmp_map[i] == MPIDR_INVALID ) + continue; + cpumask_set_cpu(i, &cpu_possible_map); + cpu_logical_map(i) = tmp_map[i]; + } +} + int __init smp_get_max_cpus (void) { diff --git a/xen/include/asm-arm/smp.h b/xen/include/asm-arm/smp.h index 83add6c..1485cc6 100644 --- a/xen/include/asm-arm/smp.h +++ b/xen/include/asm-arm/smp.h @@ -24,6 +24,7 @@ extern int arch_cpu_up(int cpu); /* Secondary CPU entry point */ extern void init_secondary(void); +extern void smp_init_cpus(void); extern void smp_clear_cpu_maps (void); extern int smp_get_max_cpus (void); #endif -- generated by git-patchbot for /home/xen/git/xen.git#master _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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