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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/alpha/kernel/sys_dp264.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/alpha/kernel/sys_dp264.c')
-rw-r--r-- | arch/alpha/kernel/sys_dp264.c | 665 |
1 files changed, 665 insertions, 0 deletions
diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c new file mode 100644 index 0000000000..9fb445d7dc --- /dev/null +++ b/arch/alpha/kernel/sys_dp264.c @@ -0,0 +1,665 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/arch/alpha/kernel/sys_dp264.c + * + * Copyright (C) 1995 David A Rusling + * Copyright (C) 1996, 1999 Jay A Estabrook + * Copyright (C) 1998, 1999 Richard Henderson + * + * Modified by Christopher C. Chimelis, 2001 to + * add support for the addition of Shark to the + * Tsunami family. + * + * Code supporting the DP264 (EV6+TSUNAMI). + */ + +#include <linux/kernel.h> +#include <linux/types.h> +#include <linux/mm.h> +#include <linux/sched.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/bitops.h> + +#include <asm/ptrace.h> +#include <asm/dma.h> +#include <asm/irq.h> +#include <asm/mmu_context.h> +#include <asm/io.h> +#include <asm/core_tsunami.h> +#include <asm/hwrpb.h> +#include <asm/tlbflush.h> + +#include "proto.h" +#include "irq_impl.h" +#include "pci_impl.h" +#include "machvec_impl.h" + + +/* Note mask bit is true for ENABLED irqs. */ +static unsigned long cached_irq_mask; +/* dp264 boards handle at max four CPUs */ +static unsigned long cpu_irq_affinity[4] = { 0UL, 0UL, 0UL, 0UL }; + +DEFINE_SPINLOCK(dp264_irq_lock); + +static void +tsunami_update_irq_hw(unsigned long mask) +{ + register tsunami_cchip *cchip = TSUNAMI_cchip; + unsigned long isa_enable = 1UL << 55; + register int bcpu = boot_cpuid; + +#ifdef CONFIG_SMP + volatile unsigned long *dim0, *dim1, *dim2, *dim3; + unsigned long mask0, mask1, mask2, mask3, dummy; + + mask &= ~isa_enable; + mask0 = mask & cpu_irq_affinity[0]; + mask1 = mask & cpu_irq_affinity[1]; + mask2 = mask & cpu_irq_affinity[2]; + mask3 = mask & cpu_irq_affinity[3]; + + if (bcpu == 0) mask0 |= isa_enable; + else if (bcpu == 1) mask1 |= isa_enable; + else if (bcpu == 2) mask2 |= isa_enable; + else mask3 |= isa_enable; + + dim0 = &cchip->dim0.csr; + dim1 = &cchip->dim1.csr; + dim2 = &cchip->dim2.csr; + dim3 = &cchip->dim3.csr; + if (!cpu_possible(0)) dim0 = &dummy; + if (!cpu_possible(1)) dim1 = &dummy; + if (!cpu_possible(2)) dim2 = &dummy; + if (!cpu_possible(3)) dim3 = &dummy; + + *dim0 = mask0; + *dim1 = mask1; + *dim2 = mask2; + *dim3 = mask3; + mb(); + *dim0; + *dim1; + *dim2; + *dim3; +#else + volatile unsigned long *dimB; + if (bcpu == 0) dimB = &cchip->dim0.csr; + else if (bcpu == 1) dimB = &cchip->dim1.csr; + else if (bcpu == 2) dimB = &cchip->dim2.csr; + else dimB = &cchip->dim3.csr; + + *dimB = mask | isa_enable; + mb(); + *dimB; +#endif +} + +static void +dp264_enable_irq(struct irq_data *d) +{ + spin_lock(&dp264_irq_lock); + cached_irq_mask |= 1UL << d->irq; + tsunami_update_irq_hw(cached_irq_mask); + spin_unlock(&dp264_irq_lock); +} + +static void +dp264_disable_irq(struct irq_data *d) +{ + spin_lock(&dp264_irq_lock); + cached_irq_mask &= ~(1UL << d->irq); + tsunami_update_irq_hw(cached_irq_mask); + spin_unlock(&dp264_irq_lock); +} + +static void +clipper_enable_irq(struct irq_data *d) +{ + spin_lock(&dp264_irq_lock); + cached_irq_mask |= 1UL << (d->irq - 16); + tsunami_update_irq_hw(cached_irq_mask); + spin_unlock(&dp264_irq_lock); +} + +static void +clipper_disable_irq(struct irq_data *d) +{ + spin_lock(&dp264_irq_lock); + cached_irq_mask &= ~(1UL << (d->irq - 16)); + tsunami_update_irq_hw(cached_irq_mask); + spin_unlock(&dp264_irq_lock); +} + +static void +cpu_set_irq_affinity(unsigned int irq, cpumask_t affinity) +{ + int cpu; + + for (cpu = 0; cpu < 4; cpu++) { + unsigned long aff = cpu_irq_affinity[cpu]; + if (cpumask_test_cpu(cpu, &affinity)) + aff |= 1UL << irq; + else + aff &= ~(1UL << irq); + cpu_irq_affinity[cpu] = aff; + } +} + +static int +dp264_set_affinity(struct irq_data *d, const struct cpumask *affinity, + bool force) +{ + spin_lock(&dp264_irq_lock); + cpu_set_irq_affinity(d->irq, *affinity); + tsunami_update_irq_hw(cached_irq_mask); + spin_unlock(&dp264_irq_lock); + + return 0; +} + +static int +clipper_set_affinity(struct irq_data *d, const struct cpumask *affinity, + bool force) +{ + spin_lock(&dp264_irq_lock); + cpu_set_irq_affinity(d->irq - 16, *affinity); + tsunami_update_irq_hw(cached_irq_mask); + spin_unlock(&dp264_irq_lock); + + return 0; +} + +static struct irq_chip dp264_irq_type = { + .name = "DP264", + .irq_unmask = dp264_enable_irq, + .irq_mask = dp264_disable_irq, + .irq_mask_ack = dp264_disable_irq, + .irq_set_affinity = dp264_set_affinity, +}; + +static struct irq_chip clipper_irq_type = { + .name = "CLIPPER", + .irq_unmask = clipper_enable_irq, + .irq_mask = clipper_disable_irq, + .irq_mask_ack = clipper_disable_irq, + .irq_set_affinity = clipper_set_affinity, +}; + +static void +dp264_device_interrupt(unsigned long vector) +{ + unsigned long pld; + unsigned int i; + + /* Read the interrupt summary register of TSUNAMI */ + pld = TSUNAMI_cchip->dir0.csr; + + /* + * Now for every possible bit set, work through them and call + * the appropriate interrupt handler. + */ + while (pld) { + i = ffz(~pld); + pld &= pld - 1; /* clear least bit set */ + if (i == 55) + isa_device_interrupt(vector); + else + handle_irq(16 + i); + } +} + +static void +dp264_srm_device_interrupt(unsigned long vector) +{ + int irq; + + irq = (vector - 0x800) >> 4; + + /* + * The SRM console reports PCI interrupts with a vector calculated by: + * + * 0x900 + (0x10 * DRIR-bit) + * + * So bit 16 shows up as IRQ 32, etc. + * + * On DP264/BRICK/MONET, we adjust it down by 16 because at least + * that many of the low order bits of the DRIR are not used, and + * so we don't count them. + */ + if (irq >= 32) + irq -= 16; + + handle_irq(irq); +} + +static void +clipper_srm_device_interrupt(unsigned long vector) +{ + int irq; + + irq = (vector - 0x800) >> 4; + +/* + * The SRM console reports PCI interrupts with a vector calculated by: + * + * 0x900 + (0x10 * DRIR-bit) + * + * So bit 16 shows up as IRQ 32, etc. + * + * CLIPPER uses bits 8-47 for PCI interrupts, so we do not need + * to scale down the vector reported, we just use it. + * + * Eg IRQ 24 is DRIR bit 8, etc, etc + */ + handle_irq(irq); +} + +static void __init +init_tsunami_irqs(struct irq_chip * ops, int imin, int imax) +{ + long i; + for (i = imin; i <= imax; ++i) { + irq_set_chip_and_handler(i, ops, handle_level_irq); + irq_set_status_flags(i, IRQ_LEVEL); + } +} + +static void __init +dp264_init_irq(void) +{ + outb(0, DMA1_RESET_REG); + outb(0, DMA2_RESET_REG); + outb(DMA_MODE_CASCADE, DMA2_MODE_REG); + outb(0, DMA2_MASK_REG); + + if (alpha_using_srm) + alpha_mv.device_interrupt = dp264_srm_device_interrupt; + + tsunami_update_irq_hw(0); + + init_i8259a_irqs(); + init_tsunami_irqs(&dp264_irq_type, 16, 47); +} + +static void __init +clipper_init_irq(void) +{ + outb(0, DMA1_RESET_REG); + outb(0, DMA2_RESET_REG); + outb(DMA_MODE_CASCADE, DMA2_MODE_REG); + outb(0, DMA2_MASK_REG); + + if (alpha_using_srm) + alpha_mv.device_interrupt = clipper_srm_device_interrupt; + + tsunami_update_irq_hw(0); + + init_i8259a_irqs(); + init_tsunami_irqs(&clipper_irq_type, 24, 63); +} + + +/* + * PCI Fixup configuration. + * + * Summary @ TSUNAMI_CSR_DIM0: + * Bit Meaning + * 0-17 Unused + *18 Interrupt SCSI B (Adaptec 7895 builtin) + *19 Interrupt SCSI A (Adaptec 7895 builtin) + *20 Interrupt Line D from slot 2 PCI0 + *21 Interrupt Line C from slot 2 PCI0 + *22 Interrupt Line B from slot 2 PCI0 + *23 Interrupt Line A from slot 2 PCI0 + *24 Interrupt Line D from slot 1 PCI0 + *25 Interrupt Line C from slot 1 PCI0 + *26 Interrupt Line B from slot 1 PCI0 + *27 Interrupt Line A from slot 1 PCI0 + *28 Interrupt Line D from slot 0 PCI0 + *29 Interrupt Line C from slot 0 PCI0 + *30 Interrupt Line B from slot 0 PCI0 + *31 Interrupt Line A from slot 0 PCI0 + * + *32 Interrupt Line D from slot 3 PCI1 + *33 Interrupt Line C from slot 3 PCI1 + *34 Interrupt Line B from slot 3 PCI1 + *35 Interrupt Line A from slot 3 PCI1 + *36 Interrupt Line D from slot 2 PCI1 + *37 Interrupt Line C from slot 2 PCI1 + *38 Interrupt Line B from slot 2 PCI1 + *39 Interrupt Line A from slot 2 PCI1 + *40 Interrupt Line D from slot 1 PCI1 + *41 Interrupt Line C from slot 1 PCI1 + *42 Interrupt Line B from slot 1 PCI1 + *43 Interrupt Line A from slot 1 PCI1 + *44 Interrupt Line D from slot 0 PCI1 + *45 Interrupt Line C from slot 0 PCI1 + *46 Interrupt Line B from slot 0 PCI1 + *47 Interrupt Line A from slot 0 PCI1 + *48-52 Unused + *53 PCI0 NMI (from Cypress) + *54 PCI0 SMI INT (from Cypress) + *55 PCI0 ISA Interrupt (from Cypress) + *56-60 Unused + *61 PCI1 Bus Error + *62 PCI0 Bus Error + *63 Reserved + * + * IdSel + * 5 Cypress Bridge I/O + * 6 SCSI Adaptec builtin + * 7 64 bit PCI option slot 0 (all busses) + * 8 64 bit PCI option slot 1 (all busses) + * 9 64 bit PCI option slot 2 (all busses) + * 10 64 bit PCI option slot 3 (not bus 0) + */ + +static int +isa_irq_fixup(const struct pci_dev *dev, int irq) +{ + u8 irq8; + + if (irq > 0) + return irq; + + /* This interrupt is routed via ISA bridge, so we'll + just have to trust whatever value the console might + have assigned. */ + pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq8); + + return irq8 & 0xf; +} + +static int +dp264_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + static char irq_tab[6][5] = { + /*INT INTA INTB INTC INTD */ + { -1, -1, -1, -1, -1}, /* IdSel 5 ISA Bridge */ + { 16+ 3, 16+ 3, 16+ 2, 16+ 2, 16+ 2}, /* IdSel 6 SCSI builtin*/ + { 16+15, 16+15, 16+14, 16+13, 16+12}, /* IdSel 7 slot 0 */ + { 16+11, 16+11, 16+10, 16+ 9, 16+ 8}, /* IdSel 8 slot 1 */ + { 16+ 7, 16+ 7, 16+ 6, 16+ 5, 16+ 4}, /* IdSel 9 slot 2 */ + { 16+ 3, 16+ 3, 16+ 2, 16+ 1, 16+ 0} /* IdSel 10 slot 3 */ + }; + const long min_idsel = 5, max_idsel = 10, irqs_per_slot = 5; + struct pci_controller *hose = dev->sysdata; + int irq = COMMON_TABLE_LOOKUP; + + if (irq > 0) + irq += 16 * hose->index; + + return isa_irq_fixup(dev, irq); +} + +static int +monet_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + static char irq_tab[13][5] = { + /*INT INTA INTB INTC INTD */ + { 45, 45, 45, 45, 45}, /* IdSel 3 21143 PCI1 */ + { -1, -1, -1, -1, -1}, /* IdSel 4 unused */ + { -1, -1, -1, -1, -1}, /* IdSel 5 unused */ + { 47, 47, 47, 47, 47}, /* IdSel 6 SCSI PCI1 */ + { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */ + { -1, -1, -1, -1, -1}, /* IdSel 8 P2P PCI1 */ +#if 1 + { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/ + { 24, 24, 25, 26, 27}, /* IdSel 15 slot 5 PCI2*/ +#else + { -1, -1, -1, -1, -1}, /* IdSel 9 unused */ + { -1, -1, -1, -1, -1}, /* IdSel 10 unused */ +#endif + { 40, 40, 41, 42, 43}, /* IdSel 11 slot 1 PCI0*/ + { 36, 36, 37, 38, 39}, /* IdSel 12 slot 2 PCI0*/ + { 32, 32, 33, 34, 35}, /* IdSel 13 slot 3 PCI0*/ + { 28, 28, 29, 30, 31}, /* IdSel 14 slot 4 PCI2*/ + { 24, 24, 25, 26, 27} /* IdSel 15 slot 5 PCI2*/ + }; + const long min_idsel = 3, max_idsel = 15, irqs_per_slot = 5; + + return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP); +} + +static u8 +monet_swizzle(struct pci_dev *dev, u8 *pinp) +{ + struct pci_controller *hose = dev->sysdata; + int slot, pin = *pinp; + + if (!dev->bus->parent) { + slot = PCI_SLOT(dev->devfn); + } + /* Check for the built-in bridge on hose 1. */ + else if (hose->index == 1 && PCI_SLOT(dev->bus->self->devfn) == 8) { + slot = PCI_SLOT(dev->devfn); + } else { + /* Must be a card-based bridge. */ + do { + /* Check for built-in bridge on hose 1. */ + if (hose->index == 1 && + PCI_SLOT(dev->bus->self->devfn) == 8) { + slot = PCI_SLOT(dev->devfn); + break; + } + pin = pci_swizzle_interrupt_pin(dev, pin); + + /* Move up the chain of bridges. */ + dev = dev->bus->self; + /* Slot of the next bridge. */ + slot = PCI_SLOT(dev->devfn); + } while (dev->bus->self); + } + *pinp = pin; + return slot; +} + +static int +webbrick_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + static char irq_tab[13][5] = { + /*INT INTA INTB INTC INTD */ + { -1, -1, -1, -1, -1}, /* IdSel 7 ISA Bridge */ + { -1, -1, -1, -1, -1}, /* IdSel 8 unused */ + { 29, 29, 29, 29, 29}, /* IdSel 9 21143 #1 */ + { -1, -1, -1, -1, -1}, /* IdSel 10 unused */ + { 30, 30, 30, 30, 30}, /* IdSel 11 21143 #2 */ + { -1, -1, -1, -1, -1}, /* IdSel 12 unused */ + { -1, -1, -1, -1, -1}, /* IdSel 13 unused */ + { 35, 35, 34, 33, 32}, /* IdSel 14 slot 0 */ + { 39, 39, 38, 37, 36}, /* IdSel 15 slot 1 */ + { 43, 43, 42, 41, 40}, /* IdSel 16 slot 2 */ + { 47, 47, 46, 45, 44}, /* IdSel 17 slot 3 */ + }; + const long min_idsel = 7, max_idsel = 17, irqs_per_slot = 5; + + return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP); +} + +static int +clipper_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) +{ + static char irq_tab[7][5] = { + /*INT INTA INTB INTC INTD */ + { 16+ 8, 16+ 8, 16+ 9, 16+10, 16+11}, /* IdSel 1 slot 1 */ + { 16+12, 16+12, 16+13, 16+14, 16+15}, /* IdSel 2 slot 2 */ + { 16+16, 16+16, 16+17, 16+18, 16+19}, /* IdSel 3 slot 3 */ + { 16+20, 16+20, 16+21, 16+22, 16+23}, /* IdSel 4 slot 4 */ + { 16+24, 16+24, 16+25, 16+26, 16+27}, /* IdSel 5 slot 5 */ + { 16+28, 16+28, 16+29, 16+30, 16+31}, /* IdSel 6 slot 6 */ + { -1, -1, -1, -1, -1} /* IdSel 7 ISA Bridge */ + }; + const long min_idsel = 1, max_idsel = 7, irqs_per_slot = 5; + struct pci_controller *hose = dev->sysdata; + int irq = COMMON_TABLE_LOOKUP; + + if (irq > 0) + irq += 16 * hose->index; + + return isa_irq_fixup(dev, irq); +} + +static void __init +dp264_init_pci(void) +{ + common_init_pci(); + SMC669_Init(0); + locate_and_init_vga(NULL); +} + +static void __init +monet_init_pci(void) +{ + common_init_pci(); + SMC669_Init(1); + es1888_init(); + locate_and_init_vga(NULL); +} + +static void __init +clipper_init_pci(void) +{ + common_init_pci(); + locate_and_init_vga(NULL); +} + +static void __init +webbrick_init_arch(void) +{ + tsunami_init_arch(); + + /* Tsunami caches 4 PTEs at a time; DS10 has only 1 hose. */ + hose_head->sg_isa->align_entry = 4; + hose_head->sg_pci->align_entry = 4; +} + + +/* + * The System Vectors + */ + +struct alpha_machine_vector dp264_mv __initmv = { + .vector_name = "DP264", + DO_EV6_MMU, + DO_DEFAULT_RTC, + DO_TSUNAMI_IO, + .machine_check = tsunami_machine_check, + .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS, + .min_io_address = DEFAULT_IO_BASE, + .min_mem_address = DEFAULT_MEM_BASE, + .pci_dac_offset = TSUNAMI_DAC_OFFSET, + + .nr_irqs = 64, + .device_interrupt = dp264_device_interrupt, + + .init_arch = tsunami_init_arch, + .init_irq = dp264_init_irq, + .init_rtc = common_init_rtc, + .init_pci = dp264_init_pci, + .kill_arch = tsunami_kill_arch, + .pci_map_irq = dp264_map_irq, + .pci_swizzle = common_swizzle, +}; +ALIAS_MV(dp264) + +struct alpha_machine_vector monet_mv __initmv = { + .vector_name = "Monet", + DO_EV6_MMU, + DO_DEFAULT_RTC, + DO_TSUNAMI_IO, + .machine_check = tsunami_machine_check, + .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS, + .min_io_address = DEFAULT_IO_BASE, + .min_mem_address = DEFAULT_MEM_BASE, + .pci_dac_offset = TSUNAMI_DAC_OFFSET, + + .nr_irqs = 64, + .device_interrupt = dp264_device_interrupt, + + .init_arch = tsunami_init_arch, + .init_irq = dp264_init_irq, + .init_rtc = common_init_rtc, + .init_pci = monet_init_pci, + .kill_arch = tsunami_kill_arch, + .pci_map_irq = monet_map_irq, + .pci_swizzle = monet_swizzle, +}; + +struct alpha_machine_vector webbrick_mv __initmv = { + .vector_name = "Webbrick", + DO_EV6_MMU, + DO_DEFAULT_RTC, + DO_TSUNAMI_IO, + .machine_check = tsunami_machine_check, + .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS, + .min_io_address = DEFAULT_IO_BASE, + .min_mem_address = DEFAULT_MEM_BASE, + .pci_dac_offset = TSUNAMI_DAC_OFFSET, + + .nr_irqs = 64, + .device_interrupt = dp264_device_interrupt, + + .init_arch = webbrick_init_arch, + .init_irq = dp264_init_irq, + .init_rtc = common_init_rtc, + .init_pci = common_init_pci, + .kill_arch = tsunami_kill_arch, + .pci_map_irq = webbrick_map_irq, + .pci_swizzle = common_swizzle, +}; + +struct alpha_machine_vector clipper_mv __initmv = { + .vector_name = "Clipper", + DO_EV6_MMU, + DO_DEFAULT_RTC, + DO_TSUNAMI_IO, + .machine_check = tsunami_machine_check, + .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS, + .min_io_address = DEFAULT_IO_BASE, + .min_mem_address = DEFAULT_MEM_BASE, + .pci_dac_offset = TSUNAMI_DAC_OFFSET, + + .nr_irqs = 64, + .device_interrupt = dp264_device_interrupt, + + .init_arch = tsunami_init_arch, + .init_irq = clipper_init_irq, + .init_rtc = common_init_rtc, + .init_pci = clipper_init_pci, + .kill_arch = tsunami_kill_arch, + .pci_map_irq = clipper_map_irq, + .pci_swizzle = common_swizzle, +}; + +/* Sharks strongly resemble Clipper, at least as far + * as interrupt routing, etc, so we're using the + * same functions as Clipper does + */ + +struct alpha_machine_vector shark_mv __initmv = { + .vector_name = "Shark", + DO_EV6_MMU, + DO_DEFAULT_RTC, + DO_TSUNAMI_IO, + .machine_check = tsunami_machine_check, + .max_isa_dma_address = ALPHA_MAX_ISA_DMA_ADDRESS, + .min_io_address = DEFAULT_IO_BASE, + .min_mem_address = DEFAULT_MEM_BASE, + .pci_dac_offset = TSUNAMI_DAC_OFFSET, + + .nr_irqs = 64, + .device_interrupt = dp264_device_interrupt, + + .init_arch = tsunami_init_arch, + .init_irq = clipper_init_irq, + .init_rtc = common_init_rtc, + .init_pci = common_init_pci, + .kill_arch = tsunami_kill_arch, + .pci_map_irq = clipper_map_irq, + .pci_swizzle = common_swizzle, +}; + +/* No alpha_mv alias for webbrick/monet/clipper, since we compile them + in unconditionally with DP264; setup_arch knows how to cope. */ |