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2014-11-24MIPS: Loongson1B: Improve early printkKelvin Cheung2-17/+14
- Determine serial port for early printk according to kernel command line. - Move to 8250/16550 serial early printk driver. Signed-off-by: Kelvin Cheung <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8023/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Loongson1B: Fix reboot problem on LS1BKelvin Cheung2-13/+18
- Correct the header file of watchdog registers - Use ioremap_nocache() to access watchdog registers instead Signed-off-by: Kelvin Cheung <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8022/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: DMA: Explain the lack of special handling for R14000/R16000.Ralf Baechle1-0/+5
Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: BCM47XX: Clean up nvram headerRafał Miłecki3-39/+33
1) Move private defines to the .c file 2) Move SPROM helper to the sprom.c 3) Drop unused code 4) Rename magic to the NVRAM_MAGIC 5) Add const to the char pointer we never modify Signed-off-by: Rafał Miłecki <[email protected]> Acked-by: Hauke Mehrtens <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8289/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: BCM47XX: Use mtd as an alternative way/API to get NVRAM contentRafał Miłecki1-4/+38
NVRAM can be read using magic memory offset, but after all it's just a flash partition. On platforms where NVRAM isn't needed early we can get it using mtd subsystem. Signed-off-by: Rafał Miłecki <[email protected]> Acked-by: Hauke Mehrtens <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8266/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Kconfig option to better exercise/debug hybrid FPRsPaul Burton2-0/+31
The hybrid FPR scheme exists to allow for compatibility between existing FP32 code and newly compiled FP64A code. Such code should hopefully be rare in the real world, and for the moment is difficult to come across. All code except that built for the FP64 ABI can correctly execute using the hybrid FPR scheme, so debugging the hybrid FPR implementation can be eased by forcing all such code to use it. This is undesirable in general due to the trap & emulate overhead of the hybrid FPR implementation, but is a very useful option to have for debugging. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7680/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: ELF: Set FP mode according to .MIPS.abiflagsPaul Burton4-20/+211
This patch reads the .MIPS.abiflags section when it is present, and sets the FP mode of the task accordingly. Any loaded ELF files which do not contain a .MIPS.abiflags section will continue to observe the previous behaviour, that is FR=1 if EF_MIPS_FP64 is set else FR=0. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7681/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: ELF: Add definition for the .MIPS.abiflags sectionPaul Burton1-0/+25
New toolchains will generate a .MIPS.abiflags section, referenced by a new PT_MIPS_ABIFLAGS program header. This section will provide information about the requirements of the ELF, including the ISA level the code is built for, the ASEs it requires, the size of various registers and its expectations of the floating point mode. This patch introduces a definition of the structure of this section and the program header, for use in a subsequent patch. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7682/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Support for hybrid FPRsPaul Burton5-10/+100
Hybrid FPRs is a scheme where scalar FP registers are 64b wide, but accesses to odd indexed single registers use bits 63:32 of the preceeding even indexed 64b register. In this mode all FP code except that built for the plain FP64 ABI can execute correctly. Most notably a combination of FP64A & FP32 code can execute correctly, allowing for existing FP32 binaries to be linked with new FP64A binaries that can make use of 64 bit FP & MSA. Hybrid FPRs are implemented by setting both the FR & FRE bits, trapping & emulating single precision FP instructions (via Reserved Instruction exceptions) whilst allowing others to execute natively. It therefore has a penalty in terms of execution speed, and should only be used when no fully native mode can be. As more binaries are recompiled to use either the FPXX or FP64(A) ABIs, the need for hybrid FPRs should diminish. However in the short to mid term it allows for a gradual transition towards that world, rather than a complete ABI break which is not feasible for some users & not desirable for many. A task will be executed using the hybrid FPR scheme when its TIF_HYBRID_FPREGS flag is set & TIF_32BIT_FPREGS is clear. A further patch will set the flags as necessary, this patch simply adds the infrastructure necessary for the hybrid FPR mode to work. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7683/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Ensure Config5.UFE is clear on bootPaul Burton1-1/+1
As is done for UFR, ensure that userland cannot directly manipulate the mode by clearing the UFE bit during boot. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7677/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: detect presence of the FRE & UFR bitsPaul Burton3-0/+7
Detect the presence of the Config5 FRE & UFE bits, as indicated by the FREP bit in FPIR. Record this as a CPU option bit, and provide a cpu_has_fre macro to ease checking of that option bit. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7678/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: define bits introduced for hybrid FPRsPaul Burton1-0/+3
Add definitions for the FRE & UFE bits in Config5, and the FREP bit in FPIR. These bits are used to support a hybrid FPR scheme allowing a mixture of FP32 & FP64 code to execute within a task. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7674/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24binfmt_elf: allow arch code to examine PT_LOPROC ... PT_HIPROC headersPaul Burton3-2/+111
MIPS is introducing new variants of its O32 ABI which differ in their handling of floating point, in order to enable a gradual transition towards a world where mips32 binaries can take advantage of new hardware features only available when configured for certain FP modes. In order to do this ELF binaries are being augmented with a new section that indicates, amongst other things, the FP mode requirements of the binary. The presence & location of such a section is indicated by a program header in the PT_LOPROC ... PT_HIPROC range. In order to allow the MIPS architecture code to examine the program header & section in question, pass all program headers in this range to an architecture-specific arch_elf_pt_proc function. This function may return an error if the header is deemed invalid or unsuitable for the system, in which case that error will be returned from load_elf_binary and upwards through the execve syscall. A means is required for the architecture code to make a decision once it is known that all such headers have been seen, but before it is too late to return from an execve syscall. For this purpose the arch_check_elf function is added, and called once, after all PT_LOPROC to PT_HIPROC headers have been passed to arch_elf_pt_proc but before the code which invoked execve has been lost. This enables the architecture code to make a decision based upon all the headers present in an ELF binary and its interpreter, as is required to forbid conflicting FP ABI requirements between an ELF & its interpreter. In order to allow data to be stored throughout the calls to the above functions, struct arch_elf_state is introduced. Finally a variant of the SET_PERSONALITY macro is introduced which accepts a pointer to the struct arch_elf_state, allowing it to act based upon state observed from the architecture specific program headers. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7679/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24binfmt_elf: load interpreter program headers earlierPaul Burton1-18/+18
Load the program headers of an ELF interpreter early enough in load_elf_binary that they can be examined before it's too late to return an error from an exec syscall. This patch does not perform any such checking, it merely lays the groundwork for a further patch to do so. No functional change is intended. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7675/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24binfmt_elf: Hoist ELF program header loading to a functionPaul Burton1-43/+56
load_elf_binary & load_elf_interp both load program headers from an ELF executable in the same way, duplicating the code. This patch introduces a helper function (load_elf_phdrs) which performs this common task & calls it from both load_elf_binary & load_elf_interp. In addition to reducing code duplication, this is part of preparing to load the ELF interpreter headers earlier such that they can be examined before it's too late to return an error from an exec syscall. Signed-off-by: Paul Burton <[email protected]> Cc: [email protected] Cc: Alexander Viro <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7676/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Loongson-3: Add RS780/SBX00 HPET supportHuacai Chen6-1/+350
CPUFreq driver need external timer, so add hpet at first. In Loongson 3, only Core-0 can receive external interrupt. As a result, timekeeping cannot absolutely use HPET timer. We use a hybrid solution: Core-0 use HPET as its clock event device, but other cores still use MIPS; clock source is global and doesn't need interrupt, so use HPET. Signed-off-by: Huacai Chen <[email protected]> Signed-off-by: Hongliang Tao <[email protected]> Cc: John Crispin <[email protected]> Cc: Steven J. Hill <[email protected]> Cc: [email protected] Cc: Fuxin Zhang <[email protected]> Cc: Zhangjin Wu <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/8329/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Loongson-3: Add oprofile supportHuacai Chen3-0/+225
Loongson-3 has two groups of performance counters, they are 4 sub- registers of CP0's REG25. This patch add oprofile support. REG25, sel 0: Perf Control of group 0; REG25, sel 1: Perf Counter of group 0; REG25, sel 2: Perf Control of group 1; REG25, sel 3: Perf Counter of group 1. Signed-off-by: Huacai Chen <[email protected]> Cc: John Crispin <[email protected]> Cc: Steven J. Hill <[email protected]> Cc: [email protected] Cc: Fuxin Zhang <[email protected]> Cc: Zhangjin Wu <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/8328/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Loongson: Improve LEFI firmware interfaceHuacai Chen14-42/+234
Machtypes of Loongson-3 machines become more and more, but there are only small differences among different machtypes. Keeping a large table of machtypes is very ugly and hard to extend. We found that the major machtype differences are UARTs information (number of UARTs, UART IRQs, UART clocks, etc.), platform devices (EC, temperature sensors, fan controllers, etc.) and some workarounds (because of some CPU bugs or mainboard bugs). In this patch we improve the UEFI-like (LEFI) interface to make all Loongson-3 machines use a same machtype "generic-loongson-machine". Signed-off-by: Huacai Chen <[email protected]> Cc: John Crispin <[email protected]> Cc: Steven J. Hill <[email protected]> Cc: [email protected] Cc: Fuxin Zhang <[email protected]> Cc: Zhangjin Wu <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/8324/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Loongson: Allow booting from any coreHuacai Chen7-36/+67
By offering Logical->Physical core id mapping, so as to reserve some physical cores via mask. This allow booting from any core when core-0 has problems. Since the maximun cores supported by Loongson-3 is 16, 32-bit cpu_startup_core_id can be split to 16-bit cpu_startup_core_id and 16-bit reserved_cores_mask for compatibility. Signed-off-by: Huacai Chen <[email protected]> Cc: John Crispin <[email protected]> Cc: Steven J. Hill <[email protected]> Cc: [email protected] Cc: Fuxin Zhang <[email protected]> Cc: Zhangjin Wu <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/8323/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Loongson-3: Add PHYS48_TO_HT40 supportHuacai Chen3-3/+22
The width of HT-bus is only 40-bit, but Loongson-3 has 48-bit physical address. This implies only node-0's memory is DMAable because high bits (Node ID) will lost. Fortunately, by configuring address windows in firmware, we can extract 2bit Node ID (bit 44~47, only bit 44~45 used now) from Loongson-3's 48-bit address space and embed it into 40-bit (bit 37~38). Every NUMA node can do DMA now (however, maximum memory of each node is reduced to 2^37 = 128GB). Signed-off-by: Huacai Chen <[email protected]> Cc: John Crispin <[email protected]> Cc: Steven J. Hill <[email protected]> Cc: [email protected] Cc: Fuxin Zhang <[email protected]> Cc: Zhangjin Wu <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/8321/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: R3000: Remove redundant parenthesesIsamu Mogi1-1/+1
Signed-off-by: Isamu Mogi <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8292/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: R3000: Replace magic numbers with macrosIsamu Mogi1-5/+6
Also include asm/mmu_context.h for ASID_MASK. Signed-off-by: Isamu Mogi <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8291/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Remove __strlen_user().Ralf Baechle3-34/+0
Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: BCM47XX: Initialize bcma bus later (with mm available)Rafał Miłecki3-6/+38
Initializaion with memory allocator available will be much simpler, this will allow cleanup in the bcma code. Signed-off-by: Rafał Miłecki <[email protected]> Acked-by: Hauke Mehrtens <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8234/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: BCM47XX: Move SPROM fallback code into sprom.cRafał Miłecki3-56/+73
This is some general cleanup as well as preparing sprom.c to become a standalone driver. We will need this for bcm53xx ARM arch support. Signed-off-by: Rafał Miłecki <[email protected]> Acked-by: Hauke Mehrtens <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8232/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: BCM47XX: Make bcma init NVRAM instead of bcm47xx polling itRafał Miłecki2-42/+13
This drops ssb/bcma dependency and will allow us to make it a standalone driver. Signed-off-by: Rafał Miłecki <[email protected]> Cc: [email protected] Cc: Hauke Mehrtens <[email protected]> Patchwork: https://patchwork.linux-mips.org/patch/8233/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: BCM47XX: Make ssb init NVRAM instead of bcm47xx polling itRafał Miłecki3-22/+23
This makes NVRAM code less bcm47xx/ssb specific allowing it to become a standalone driver in the future. A similar patch for bcma will follow when it's ready. Signed-off-by: Rafał Miłecki <[email protected]> Acked-by: Hauke Mehrtens <[email protected]> Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7612/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: BCM47XX: Get rid of calls to KSEG1ADDRRafał Miłecki1-12/+32
We should be using ioremap_nocache helper which handles remaps in a smarter way. Signed-off-by: Rafał Miłecki <[email protected]> Cc: [email protected] Cc: Hauke Mehrtens <[email protected]> Patchwork: http://patchwork.linux-mips.org/patch/7611/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Move gic.h to include/linux/irqchip/mips-gic.hAndrew Bresticker18-18/+17
Now that the MIPS GIC irqchip lives in drivers/irqchip/, move its header over to include/linux/irqchip/. Signed-off-by: Andrew Bresticker <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Paul Burton <[email protected]> Cc: Qais Yousef <[email protected]> Cc: John Crispin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8129/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Use proper iomem accessorsAndrew Bresticker2-136/+142
Get rid of the ugly GICREAD/GICWRITE/GICBIS macros and use proper iomem accessors instead. Since the GIC registers are not directly accessed outside of the GIC driver any more, make gic_base static and move all the GIC register manipulation macros out of gic.h, converting them to static inline functions. Signed-off-by: Andrew Bresticker <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Paul Burton <[email protected]> Cc: Qais Yousef <[email protected]> Cc: John Crispin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8127/ Patchwork: https://patchwork.linux-mips.org/patch/8229/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Malta: Stop using GIC REG macrosAndrew Bresticker1-9/+9
Stop using the REG macros from gic.h and instead use proper iomem accessors. Signed-off-by: Andrew Bresticker <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Paul Burton <[email protected]> Cc: Qais Yousef <[email protected]> Cc: John Crispin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8126/ Patchwork: https://patchwork.linux-mips.org/patch/8227/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: SEAD3: Stop using GIC REG macrosAndrew Bresticker1-4/+4
Stop using the REG macros from gic.h and instead use proper iomem accessors. Signed-off-by: Andrew Bresticker <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Paul Burton <[email protected]> Cc: Qais Yousef <[email protected]> Cc: John Crispin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8125/ Patchwork: https://patchwork.linux-mips.org/patch/8228/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Export function to read counter widthAndrew Bresticker3-8/+13
Export the function gic_get_count_width to read the width of the GIC global counter from GIC_SH_CONFIG. Update the GIC clocksource driver to use this new function. Signed-off-by: Andrew Bresticker <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Paul Burton <[email protected]> Cc: Qais Yousef <[email protected]> Cc: John Crispin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8124/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Malta: Use gic_read_count() to read GIC timerAndrew Bresticker1-11/+3
Instead of reading the GIC registers directly, use the interface the GIC driver already exposes for reading the global timer. Also get rid of the unnecessary #ifdefs. Signed-off-by: Andrew Bresticker <[email protected]> Cc: Daniel Lezcano <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Paul Burton <[email protected]> Cc: Qais Yousef <[email protected]> Cc: John Crispin <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/8123/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: SEAD3: Use generic plat_irq_dispatchAndrew Bresticker1-22/+1
The generic plat_irq_dispatch provided in irq_cpu.c is sufficient for dispatching interrupts on SEAD-3 in legacy and vectored interrupt modes. Signed-off-by: Andrew Bresticker <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7822/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Malta: Use generic plat_irq_dispatchAndrew Bresticker1-92/+0
The generic plat_irq_dispatch provided in irq_cpu.c is sufficient for dispatching interrupts on Malta in legacy and vectored interrupt modes. Signed-off-by: Andrew Bresticker <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7821/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Remove unnecessary globalsAndrew Bresticker2-29/+4
Now that all GIC interrupt routing and handling logic is in the GIC driver itself, un-export variables/functions which are no longer used outside the GIC driver. This also allows us to remove gic_compare_int and combine gic_get_int_mask with gic_get_int since these interfaces are no longer used. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7820/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Support local interruptsAndrew Bresticker9-125/+279
The MIPS GIC supports 7 local interrupts, 2 of which are the GIC local watchdog and count/compare timer. The remainder are CPU interrupts which may optionally be re-routed through the GIC. GIC hardware IRQs 0-6 are now used for local interrupts while hardware IRQs 7+ are used for external (shared) interrupts. Note that the 5 CPU interrupts may not be re-routable through the GIC. In that case mapping will fail and the vectors reported in C0_IntCtl should be used instead. gic_get_c0_compare_int() and gic_get_c0_perfcount_int() will return the correct IRQ number to use for the C0 timer and perfcounter interrupts based on the routability of those interrupts through the GIC. A separate irq_chip, with callbacks that mask/unmask the local interrupt on all CPUs, is used for the C0 timer and performance counter interrupts since all other platforms do not use the percpu IRQ API for those interrupts. Malta, SEAD-3, and the GIC clockevent driver have been updated to use local interrupts and the R4K clockevent driver has been updated to poll for C0 timer interrupts through the GIC when the GIC is present. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7819/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Use separate edge/level irq_chipsAndrew Bresticker2-12/+21
GIC edge-triggered interrupts must be acknowledged by clearing the edge detector via a write to GIC_SH_WEDGE. Create a separate edge-triggered irq_chip with the appropriate irq_ack() callback. This also allows us to get rid of gic_irq_flags. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7818/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Probe for number of external interruptsAndrew Bresticker4-22/+22
Instead of requiring platforms to define the correct GIC_NUM_INTRS, use the value reported in GIC_SH_CONFIG. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7817/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Stop using per-platform mapping tablesAndrew Bresticker10-325/+198
Now that the GIC properly uses IRQ domains, kill off the per-platform routing tables that were used to make the GIC appear transparent. This includes: - removing the mapping tables and the support for applying them, - moving GIC IPI support to the GIC driver, - properly routing the i8259 through the GIC on Malta, and - updating IRQ assignments on SEAD-3 when the GIC is present. Platforms no longer will pass an interrupt mapping table to gic_init. Instead, they will pass the CPU interrupt vector (2 - 7) that they expect the GIC to route interrupts to. Note that in EIC mode this value is ignored and all GIC interrupts are routed to EIC vector 1. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7816/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Use IRQ domainsAndrew Bresticker4-32/+40
Use a simple IRQ domain for the MIPS GIC. Remove the gic_platform_init callback as it's no longer necessary for it to set the irqchip. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7811/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Fix gic_set_affinity() return valueAndrew Bresticker1-1/+1
If the online CPU check in gic_set_affinity() fails, return a proper errno value instead of -1. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7814/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Implement irq_set_type callbackAndrew Bresticker2-2/+64
Implement an irq_set_type callback for the GIC which is used to set the polarity and trigger type of GIC interrupts. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7810/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24irqchip: mips-gic: Remove platform irq_ack/irq_eoi callbacksAndrew Bresticker4-42/+8
There's no need for platforms to have their own GIC irq_ack/irq_eoi callbacks. irq_ack need only clear the GIC's edge detector on edge-triggered interrupts and there's no need at all for irq_eoi. Also get rid of the mask_ack callback since it's not necessary either. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7809/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Move GIC to drivers/irqchip/Andrew Bresticker8-16/+16
Move GIC irqchip support to drivers/irqchip/ and rename the Kconfig option from IRQ_GIC to MIPS_GIC to avoid confusion with the ARM GIC. Signed-off-by: Andrew Bresticker <[email protected]> Acked-by: Jason Cooper <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7812/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Move MIPS_GIC_IRQ_BASE into platform irq.hAndrew Bresticker3-4/+6
Define a generic MIPS_GIC_IRQ_BASE which should be suitable for all current boards in <mach-generic/irq.h>. Signed-off-by: Andrew Bresticker <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7808/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: Malta: Move MSC01 interrupt baseAndrew Bresticker1-4/+4
The GIC on Malta boards supports a total of 47 interrupts (40 shared and 7 local) and is assigned a base of 24. This overlaps with the MSC01 interrupt assignments which have a base of 64, so move the MSC01 interrupt base back a bit to give the GIC some room. Signed-off-by: Andrew Bresticker <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7815/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: sead3: Do not overlap CPU/GIC IRQ rangesAndrew Bresticker1-1/+1
In preparation for GIC IRQ domain support, assign a GIC IRQ base that does not overlap with the CPU IRQs. Note that this breaks SEAD-3 when the GIC is in EIC mode, though I'm not convinced it was working before either. It will be fixed in the following patches. Signed-off-by: Andrew Bresticker <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7813/ Signed-off-by: Ralf Baechle <[email protected]>
2014-11-24MIPS: SEAD3: Remove sead3-serial.cAndrew Bresticker1-45/+0
It's a duplicate of sead3-platform.c and is not even compiled. Remove it before we start fixing up IRQ assignments. Signed-off-by: Andrew Bresticker <[email protected]> Reviewed-by: Qais Yousef <[email protected]> Tested-by: Qais Yousef <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Jason Cooper <[email protected]> Cc: Jeffrey Deans <[email protected]> Cc: Markos Chandras <[email protected]> Cc: Paul Burton <[email protected]> Cc: Jonas Gorski <[email protected]> Cc: John Crispin <[email protected]> Cc: David Daney <[email protected]> Cc: [email protected] Cc: [email protected] Patchwork: https://patchwork.linux-mips.org/patch/7807/ Signed-off-by: Ralf Baechle <[email protected]>
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