diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/sysdev/xics/icp-hv.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/powerpc/sysdev/xics/icp-hv.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/sysdev/xics/icp-hv.c b/ANDROID_3.4.5/arch/powerpc/sysdev/xics/icp-hv.c deleted file mode 100644 index 253dce98..00000000 --- a/ANDROID_3.4.5/arch/powerpc/sysdev/xics/icp-hv.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * Copyright 2011 IBM Corporation. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version - * 2 of the License, or (at your option) any later version. - * - */ -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/irq.h> -#include <linux/smp.h> -#include <linux/interrupt.h> -#include <linux/init.h> -#include <linux/cpu.h> -#include <linux/of.h> - -#include <asm/smp.h> -#include <asm/irq.h> -#include <asm/errno.h> -#include <asm/xics.h> -#include <asm/io.h> -#include <asm/hvcall.h> - -static inline unsigned int icp_hv_get_xirr(unsigned char cppr) -{ - unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; - long rc; - unsigned int ret = XICS_IRQ_SPURIOUS; - - rc = plpar_hcall(H_XIRR, retbuf, cppr); - if (rc == H_SUCCESS) { - ret = (unsigned int)retbuf[0]; - } else { - pr_err("%s: bad return code xirr cppr=0x%x returned %ld\n", - __func__, cppr, rc); - WARN_ON_ONCE(1); - } - - return ret; -} - -static inline void icp_hv_set_cppr(u8 value) -{ - long rc = plpar_hcall_norets(H_CPPR, value); - if (rc != H_SUCCESS) { - pr_err("%s: bad return code cppr cppr=0x%x returned %ld\n", - __func__, value, rc); - WARN_ON_ONCE(1); - } -} - -static inline void icp_hv_set_xirr(unsigned int value) -{ - long rc = plpar_hcall_norets(H_EOI, value); - if (rc != H_SUCCESS) { - pr_err("%s: bad return code eoi xirr=0x%x returned %ld\n", - __func__, value, rc); - WARN_ON_ONCE(1); - icp_hv_set_cppr(value >> 24); - } -} - -static inline void icp_hv_set_qirr(int n_cpu , u8 value) -{ - int hw_cpu = get_hard_smp_processor_id(n_cpu); - long rc = plpar_hcall_norets(H_IPI, hw_cpu, value); - if (rc != H_SUCCESS) { - pr_err("%s: bad return code qirr cpu=%d hw_cpu=%d mfrr=0x%x " - "returned %ld\n", __func__, n_cpu, hw_cpu, value, rc); - WARN_ON_ONCE(1); - } -} - -static void icp_hv_eoi(struct irq_data *d) -{ - unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); - - iosync(); - icp_hv_set_xirr((xics_pop_cppr() << 24) | hw_irq); -} - -static void icp_hv_teardown_cpu(void) -{ - int cpu = smp_processor_id(); - - /* Clear any pending IPI */ - icp_hv_set_qirr(cpu, 0xff); -} - -static void icp_hv_flush_ipi(void) -{ - /* We take the ipi irq but and never return so we - * need to EOI the IPI, but want to leave our priority 0 - * - * should we check all the other interrupts too? - * should we be flagging idle loop instead? - * or creating some task to be scheduled? - */ - - icp_hv_set_xirr((0x00 << 24) | XICS_IPI); -} - -static unsigned int icp_hv_get_irq(void) -{ - unsigned int xirr = icp_hv_get_xirr(xics_cppr_top()); - unsigned int vec = xirr & 0x00ffffff; - unsigned int irq; - - if (vec == XICS_IRQ_SPURIOUS) - return NO_IRQ; - - irq = irq_radix_revmap_lookup(xics_host, vec); - if (likely(irq != NO_IRQ)) { - xics_push_cppr(vec); - return irq; - } - - /* We don't have a linux mapping, so have rtas mask it. */ - xics_mask_unknown_vec(vec); - - /* We might learn about it later, so EOI it */ - icp_hv_set_xirr(xirr); - - return NO_IRQ; -} - -static void icp_hv_set_cpu_priority(unsigned char cppr) -{ - xics_set_base_cppr(cppr); - icp_hv_set_cppr(cppr); - iosync(); -} - -#ifdef CONFIG_SMP - -static void icp_hv_cause_ipi(int cpu, unsigned long data) -{ - icp_hv_set_qirr(cpu, IPI_PRIORITY); -} - -static irqreturn_t icp_hv_ipi_action(int irq, void *dev_id) -{ - int cpu = smp_processor_id(); - - icp_hv_set_qirr(cpu, 0xff); - - return smp_ipi_demux(); -} - -#endif /* CONFIG_SMP */ - -static const struct icp_ops icp_hv_ops = { - .get_irq = icp_hv_get_irq, - .eoi = icp_hv_eoi, - .set_priority = icp_hv_set_cpu_priority, - .teardown_cpu = icp_hv_teardown_cpu, - .flush_ipi = icp_hv_flush_ipi, -#ifdef CONFIG_SMP - .ipi_action = icp_hv_ipi_action, - .cause_ipi = icp_hv_cause_ipi, -#endif -}; - -int icp_hv_init(void) -{ - struct device_node *np; - - np = of_find_compatible_node(NULL, NULL, "ibm,ppc-xicp"); - if (!np) - np = of_find_node_by_type(NULL, - "PowerPC-External-Interrupt-Presentation"); - if (!np) - return -ENODEV; - - icp_ops = &icp_hv_ops; - - return 0; -} - |