1/* 2 * Malta Platform-specific hooks for SMP operation 3 */ 4#include <linux/init.h> 5 6#include <asm/mipsregs.h> 7#include <asm/mipsmtregs.h> 8#include <asm/smtc.h> 9#include <asm/smtc_ipi.h> 10 11/* VPE/SMP Prototype implements platform interfaces directly */ 12 13/* 14 * Cause the specified action to be performed on a targeted "CPU" 15 */ 16 17void core_send_ipi(int cpu, unsigned int action) 18{ 19 /* "CPU" may be TC of same VPE, VPE of same CPU, or different CPU */ 20 smtc_send_ipi(cpu, LINUX_SMP_IPI, action); 21} 22 23/* 24 * Platform "CPU" startup hook 25 */ 26 27void prom_boot_secondary(int cpu, struct task_struct *idle) 28{ 29 smtc_boot_secondary(cpu, idle); 30} 31 32/* 33 * Post-config but pre-boot cleanup entry point 34 */ 35 36void prom_init_secondary(void) 37{ 38 void smtc_init_secondary(void); 39 int myvpe; 40 41 /* Don't enable Malta I/O interrupts (IP2) for secondary VPEs */ 42 myvpe = read_c0_tcbind() & TCBIND_CURVPE; 43 if (myvpe != 0) { 44 /* Ideally, this should be done only once per VPE, but... */ 45 clear_c0_status(STATUSF_IP2); 46 set_c0_status(STATUSF_IP0 | STATUSF_IP1 | STATUSF_IP3 47 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 48 | STATUSF_IP7); 49 } 50 51 smtc_init_secondary(); 52} 53 54/* 55 * Platform SMP pre-initialization 56 * 57 * As noted above, we can assume a single CPU for now 58 * but it may be multithreaded. 59 */ 60 61void plat_smp_setup(void) 62{ 63 if (read_c0_config3() & (1<<2)) 64 mipsmt_build_cpu_map(0); 65} 66 67void __init plat_prepare_cpus(unsigned int max_cpus) 68{ 69 if (read_c0_config3() & (1<<2)) 70 mipsmt_prepare_cpus(); 71} 72 73/* 74 * SMP initialization finalization entry point 75 */ 76 77void prom_smp_finish(void) 78{ 79 smtc_smp_finish(); 80} 81 82/* 83 * Hook for after all CPUs are online 84 */ 85 86void prom_cpus_done(void) 87{ 88} 89