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path: root/arch/mips/netlogic/common/irq.c
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2013-07-19MIPS: Netlogic: Add XLP PIC irqdomainJayachandran C1-11/+57
Add a legacy irq domain for the XLP PIC interrupts. This will be used when interrupts are assigned from the device tree. This change is required after commit c5cdc67 "irqdomain: Remove temporary MIPS workaround code". Signed-off-by: Jayachandran C <[email protected]> Cc: [email protected] Cc: Jayachandran C <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/5597/ Signed-off-by: Ralf Baechle <[email protected]>
2013-06-13MIPS: Netlogic: Fix plat_irq_dispatchJayachandran C1-4/+3
Fix an issue in plat_irq_dispatch due to which it can call do_IRQ with a PIC irq that is not mapped. When a per-cpu interrupt and a PIC interrupt are both active, the check 'eirr & PERCPU_IRQ_MASK' will be true, but the interrupt in 'i' will be the number of the PIC interrupt. In this case, we will call do_IRQ on the PIC interrupt without mapping it with nlm_irq_to_xirq(). Fix this by using __ffs64 instead of __ilog2_u64 and using the interrupt number instead of mask to identify per-cpu interrupts. Signed-off-by: Jayachandran C <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/5432/ Signed-off-by: Ralf Baechle <[email protected]>
2013-02-21Merge branch 'mips-next-3.9' of ↵Ralf Baechle1-27/+14
git://git.linux-mips.org/pub/scm/john/linux-john into mips-for-linux-next
2013-02-17MIPS: Netlogic: Use PIC timer as a clocksourceJayachandran C1-1/+1
The XLR/XLS/XLP PIC has a 8 countdown timers which run at the PIC frequencey. One of these can be used as a clocksource to provide timestamps that is common across cores. This can be used in place of the count/compare clocksource which is per-CPU. On XLR/XLS PIC registers are 32-bit, so we just use the lower 32-bits of the PIC counter. On XLP, the whole 64-bit can be used. Provide common macros and functions for PIC timer registers on XLR/XLS and XLP, and use them to register a PIC clocksource. Signed-off-by: Jayachandran C <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/4786/ Signed-off-by: John Crispin <[email protected]>
2013-02-17MIPS: Netlogic: Optimize EIMR/EIRR accesses in 32-bitJayachandran C1-26/+13
Provide functions ack_c0_eirr(), set_c0_eimr(), clear_c0_eimr() and read_c0_eirr_and_eimr() that do the EIMR and EIRR operations and update the interrupt handling code to use these functions. Also, use the EIMR register functions to mask interrupts in the irq code. The 64-bit interrupt request and mask registers (EIRR and EIMR) are accessed when the interrupts are off, and the common operations are to set or clear a bit in these registers. Using the 64-bit c0 access functions for these operations is not optimal in 32-bit, because it will disable/restore interrupts and split/join the 64-bit value during each register access. Signed-off-by: Jayachandran C <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/4790/ Signed-off-by: John Crispin <[email protected]>
2013-02-01MIPS: Whitespace cleanup.Ralf Baechle1-2/+2
Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle <[email protected]>
2012-11-09MIPS: Netlogic: Support for XLR/XLS Fast Message NetworkGanesan Ramalingam1-2/+6
On XLR/XLS, the cpu cores communicate with fast on-chip devices (e.g. network accelerator, security engine etc.) using the Fast Messaging Network(FMN). The FMN queues and credits needs to be configured and intialized before it can be used. The co-processor 2 on XLR/XLS CPU cores has registers for FMN access, and the XLR/XLS has custom instructions for sending and loading messages. The FMN can deliver also per-cpu interrupts when messages are available at the CPU. This patch adds FMN initialization, adds interrupt setup and handling, and also provides support for sending and receiving FMN messages. Signed-off-by: Ganesan Ramalingam <[email protected]> Signed-off-by: Jayachandran C <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/4468 Signed-off-by: John Crispin <[email protected]>
2012-11-09MIPS: Netlogic: PIC IRQ handling update for multi-chipJayachandran C1-73/+97
Create struct nlm_pic_irq for interrupts handled by the PIC. This simplifies IRQ handling for multi-SoC as well as the single SoC cases. Also split the setup of percpu and PIC interrupts so that we can configure the PIC interrupts for every node. Signed-off-by: Jayachandran C <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/4467 Signed-off-by: John Crispin <[email protected]>
2012-11-09MIPS: Netlogic: Support for multi-chip configurationJayachandran C1-19/+36
Upto 4 Netlogic XLP SoCs can be connected over ICI links to form a coherent multi-node system. Each SoC has its own set of on-chip devices including PIC. To support this, add a per SoC stucture and use it for the PIC and SYS block addresses instead of using global variables. Signed-off-by: Jayachandran C <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/4469 Signed-off-by: John Crispin <[email protected]>
2012-03-28Disintegrate asm/system.h for MIPSDavid Howells1-1/+0
Disintegrate asm/system.h for MIPS. Signed-off-by: David Howells <[email protected]> Acked-by: Ralf Baechle <[email protected]> cc: [email protected]
2011-12-07MIPS: Netlogic: Add XLP platform files for XLP SoCJayachandran C1-0/+8
- Update common files to support XLP. - Add arch/mips/include/asm/netlogic/xlp-hal for register definitions and access macros - Add arch/mips/netlogic/xlp/ for XLP specific files. Signed-off-by: Jayachandran C <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/2967/ Signed-off-by: Ralf Baechle <[email protected]>
2011-12-07MIPS: Netlogic: Move code common with XLP to common/Jayachandran C1-0/+230
- Move code that can be shared with XLP (irq.c, smp.c, time.c and xlr_console.c) to arch/mips/netlogic/common - Add asm/netlogic/haldefs.h and asm/netlogic/common.h for common and io functions shared with XLP - remove type 'nlm_reg_t *' and use uint64_t for mmio offsets - Move XLR specific code in smp.c to xlr/wakeup.c - Move XLR specific PCI code from irq.c to mips/pci/pci-xlr.c - Provide API for pic functions called from common/irq.c Signed-off-by: Jayachandran C <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/2964/ Signed-off-by: Ralf Baechle <[email protected]>
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