/*- * Copyright (c) 1998 Doug Rabson * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: cia.c,v 1.14 1998/12/04 22:54:42 archie Exp $ */ /*- * Copyright (c) 1998 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, * NASA Ames Research Center. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ /* * Copyright (c) 1995, 1996 Carnegie-Mellon University. * All rights reserved. * * Author: Chris G. Demetriou * * Permission to use, copy, modify and distribute this software and * its documentation is hereby granted, provided that both the copyright * notice and this permission notice appear in all copies of the * software, derivative works or modified versions, and any portions * thereof, and that both notices appear in supporting documentation. * * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. * * Carnegie Mellon requests users of this software to return to * * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU * School of Computer Science * Carnegie Mellon University * Pittsburgh PA 15213-3890 * * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. */ #include "opt_cpu.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define KV(pa) ALPHA_PHYS_TO_K0SEG(pa) static devclass_t cia_devclass; static device_t cia0; /* XXX only one for now */ static u_int32_t cia_hae_mem; static int cia_rev, cia_ispyxis, cia_config; struct cia_softc { int junk; /* no softc */ }; #define CIA_SOFTC(dev) (struct cia_softc*) device_get_softc(dev) static alpha_chipset_inb_t cia_bwx_inb, cia_swiz_inb; static alpha_chipset_inw_t cia_bwx_inw, cia_swiz_inw; static alpha_chipset_inl_t cia_bwx_inl, cia_swiz_inl; static alpha_chipset_outb_t cia_bwx_outb, cia_swiz_outb; static alpha_chipset_outw_t cia_bwx_outw, cia_swiz_outw; static alpha_chipset_outl_t cia_bwx_outl, cia_swiz_outl; static alpha_chipset_readb_t cia_bwx_readb, cia_swiz_readb; static alpha_chipset_readw_t cia_bwx_readw, cia_swiz_readw; static alpha_chipset_readl_t cia_bwx_readl, cia_swiz_readl; static alpha_chipset_writeb_t cia_bwx_writeb, cia_swiz_writeb; static alpha_chipset_writew_t cia_bwx_writew, cia_swiz_writew; static alpha_chipset_writel_t cia_bwx_writel, cia_swiz_writel; static alpha_chipset_maxdevs_t cia_bwx_maxdevs, cia_swiz_maxdevs; static alpha_chipset_cfgreadb_t cia_bwx_cfgreadb, cia_swiz_cfgreadb; static alpha_chipset_cfgreadw_t cia_bwx_cfgreadw, cia_swiz_cfgreadw; static alpha_chipset_cfgreadl_t cia_bwx_cfgreadl, cia_swiz_cfgreadl; static alpha_chipset_cfgwriteb_t cia_bwx_cfgwriteb, cia_swiz_cfgwriteb; static alpha_chipset_cfgwritew_t cia_bwx_cfgwritew, cia_swiz_cfgwritew; static alpha_chipset_cfgwritel_t cia_bwx_cfgwritel, cia_swiz_cfgwritel; static alpha_chipset_addrcvt_t cia_cvt_dense, cia_cvt_bwx; static alpha_chipset_read_hae_t cia_read_hae; static alpha_chipset_write_hae_t cia_write_hae; static alpha_chipset_t cia_bwx_chipset = { cia_bwx_inb, cia_bwx_inw, cia_bwx_inl, cia_bwx_outb, cia_bwx_outw, cia_bwx_outl, cia_bwx_readb, cia_bwx_readw, cia_bwx_readl, cia_bwx_writeb, cia_bwx_writew, cia_bwx_writel, cia_bwx_maxdevs, cia_bwx_cfgreadb, cia_bwx_cfgreadw, cia_bwx_cfgreadl, cia_bwx_cfgwriteb, cia_bwx_cfgwritew, cia_bwx_cfgwritel, cia_cvt_dense, cia_cvt_bwx, cia_read_hae, cia_write_hae, }; static alpha_chipset_t cia_swiz_chipset = { cia_swiz_inb, cia_swiz_inw, cia_swiz_inl, cia_swiz_outb, cia_swiz_outw, cia_swiz_outl, cia_swiz_readb, cia_swiz_readw, cia_swiz_readl, cia_swiz_writeb, cia_swiz_writew, cia_swiz_writel, cia_swiz_maxdevs, cia_swiz_cfgreadb, cia_swiz_cfgreadw, cia_swiz_cfgreadl, cia_swiz_cfgwriteb, cia_swiz_cfgwritew, cia_swiz_cfgwritel, cia_cvt_dense, NULL, cia_read_hae, cia_write_hae, }; static u_int8_t cia_bwx_inb(u_int32_t port) { alpha_mb(); return ldbu(KV(CIA_EV56_BWIO+BWX_EV56_INT1 + port)); } static u_int16_t cia_bwx_inw(u_int32_t port) { alpha_mb(); return ldwu(KV(CIA_EV56_BWIO+BWX_EV56_INT2 + port)); } static u_int32_t cia_bwx_inl(u_int32_t port) { alpha_mb(); return ldl(KV(CIA_EV56_BWIO+BWX_EV56_INT4 + port)); } static void cia_bwx_outb(u_int32_t port, u_int8_t data) { stb(KV(CIA_EV56_BWIO+BWX_EV56_INT1 + port), data); alpha_wmb(); } static void cia_bwx_outw(u_int32_t port, u_int16_t data) { stw(KV(CIA_EV56_BWIO+BWX_EV56_INT2 + port), data); alpha_wmb(); } static void cia_bwx_outl(u_int32_t port, u_int32_t data) { stl(KV(CIA_EV56_BWIO+BWX_EV56_INT4 + port), data); alpha_wmb(); } static u_int8_t cia_bwx_readb(u_int32_t pa) { alpha_mb(); return ldbu(KV(CIA_EV56_BWMEM+BWX_EV56_INT1 + pa)); } static u_int16_t cia_bwx_readw(u_int32_t pa) { alpha_mb(); return ldwu(KV(CIA_EV56_BWMEM+BWX_EV56_INT2 + pa)); } static u_int32_t cia_bwx_readl(u_int32_t pa) { alpha_mb(); return ldl(KV(CIA_EV56_BWMEM+BWX_EV56_INT4 + pa)); } static void cia_bwx_writeb(u_int32_t pa, u_int8_t data) { stb(KV(CIA_EV56_BWMEM+BWX_EV56_INT1 + pa), data); alpha_wmb(); } static void cia_bwx_writew(u_int32_t pa, u_int16_t data) { stw(KV(CIA_EV56_BWMEM+BWX_EV56_INT2 + pa), data); alpha_wmb(); } static void cia_bwx_writel(u_int32_t pa, u_int32_t data) { stl(KV(CIA_EV56_BWMEM+BWX_EV56_INT4 + pa), data); alpha_wmb(); } static int cia_bwx_maxdevs(u_int b) { return 12; /* XXX */ } static void cia_clear_abort(void) { /* * Some (apparently-common) revisions of EB164 and AlphaStation * firmware do the Wrong thing with PCI master and target aborts, * which are caused by accesing the configuration space of devices * that don't exist (for example). * * To work around this, we clear the CIA error register's PCI * master and target abort bits before touching PCI configuration * space and check it afterwards. If it indicates a master or target * abort, the device wasn't there so we return 0xffffffff. */ REGVAL(CIA_CSR_CIA_ERR) = CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT; alpha_mb(); alpha_pal_draina(); } static int cia_check_abort(void) { u_int32_t errbits; int ba = 0; alpha_pal_draina(); alpha_mb(); errbits = REGVAL(CIA_CSR_CIA_ERR); if (errbits & (CIA_ERR_RCVD_MAS_ABT|CIA_ERR_RCVD_TAR_ABT)) ba = 1; if (errbits) { REGVAL(CIA_CSR_CIA_ERR) = errbits; alpha_mb(); alpha_pal_draina(); } return ba; } #define CIA_BWX_CFGADDR(b, s, f, r) \ KV(((b) ? CIA_EV56_BWCONF1 : CIA_EV56_BWCONF0) \ | ((b) << 16) | ((s) << 11) | ((f) << 8) | (r)) static u_int8_t cia_bwx_cfgreadb(u_int b, u_int s, u_int f, u_int r) { vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); u_int8_t data; cia_clear_abort(); if (badaddr((caddr_t)va, 1)) { cia_check_abort(); return ~0; } data = ldbu(va+BWX_EV56_INT1); if (cia_check_abort()) return ~0; return data; } static u_int16_t cia_bwx_cfgreadw(u_int b, u_int s, u_int f, u_int r) { vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); u_int16_t data; cia_clear_abort(); if (badaddr((caddr_t)va, 2)) { cia_check_abort(); return ~0; } data = ldwu(va+BWX_EV56_INT2); if (cia_check_abort()) return ~0; return data; } static u_int32_t cia_bwx_cfgreadl(u_int b, u_int s, u_int f, u_int r) { vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); u_int32_t data; cia_clear_abort(); if (badaddr((caddr_t)va, 4)) { cia_check_abort(); return ~0; } data = ldl(va+BWX_EV56_INT4); if (cia_check_abort()) return ~0; return data; } static void cia_bwx_cfgwriteb(u_int b, u_int s, u_int f, u_int r, u_int8_t data) { vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); cia_clear_abort(); if (badaddr((caddr_t)va, 1)) return; stb(va+BWX_EV56_INT1, data); cia_check_abort(); } static void cia_bwx_cfgwritew(u_int b, u_int s, u_int f, u_int r, u_int16_t data) { vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); if (badaddr((caddr_t)va, 2)) return; stw(va+BWX_EV56_INT2, data); cia_check_abort(); } static void cia_bwx_cfgwritel(u_int b, u_int s, u_int f, u_int r, u_int32_t data) { vm_offset_t va = CIA_BWX_CFGADDR(b, s, f, r); if (badaddr((caddr_t)va, 4)) return; stl(va+BWX_EV56_INT4, data); cia_check_abort(); } static u_int8_t cia_swiz_inb(u_int32_t port) { alpha_mb(); return SPARSE_READ_BYTE(KV(CIA_PCI_SIO1), port); } static u_int16_t cia_swiz_inw(u_int32_t port) { alpha_mb(); return SPARSE_READ_WORD(KV(CIA_PCI_SIO1), port); } static u_int32_t cia_swiz_inl(u_int32_t port) { alpha_mb(); return SPARSE_READ_LONG(KV(CIA_PCI_SIO1), port); } static void cia_swiz_outb(u_int32_t port, u_int8_t data) { SPARSE_WRITE_BYTE(KV(CIA_PCI_SIO1), port, data); alpha_wmb(); } static void cia_swiz_outw(u_int32_t port, u_int16_t data) { SPARSE_WRITE_WORD(KV(CIA_PCI_SIO1), port, data); alpha_wmb(); } static void cia_swiz_outl(u_int32_t port, u_int32_t data) { SPARSE_WRITE_LONG(KV(CIA_PCI_SIO1), port, data); alpha_wmb(); } static __inline void cia_swiz_set_hae_mem(u_int32_t *pa) { /* Only bother with region 1 */ #define REG1 (7 << 29) if ((cia_hae_mem & REG1) != (*pa & REG1)) { /* * Seems fairly paranoid but this is what Linux does... */ u_int32_t msb = *pa & REG1; int s = splhigh(); cia_hae_mem = (cia_hae_mem & ~REG1) | msb; REGVAL(CIA_CSR_HAE_MEM) = cia_hae_mem; alpha_mb(); cia_hae_mem = REGVAL(CIA_CSR_HAE_MEM); splx(s); *pa -= msb; } } static u_int8_t cia_swiz_readb(u_int32_t pa) { alpha_mb(); cia_swiz_set_hae_mem(&pa); return SPARSE_READ_BYTE(KV(CIA_PCI_SMEM1), pa); } static u_int16_t cia_swiz_readw(u_int32_t pa) { alpha_mb(); cia_swiz_set_hae_mem(&pa); return SPARSE_READ_WORD(KV(CIA_PCI_SMEM1), pa); } static u_int32_t cia_swiz_readl(u_int32_t pa) { alpha_mb(); cia_swiz_set_hae_mem(&pa); return SPARSE_READ_LONG(KV(CIA_PCI_SMEM1), pa); } static void cia_swiz_writeb(u_int32_t pa, u_int8_t data) { cia_swiz_set_hae_mem(&pa); SPARSE_WRITE_BYTE(KV(CIA_PCI_SMEM1), pa, data); alpha_wmb(); } static void cia_swiz_writew(u_int32_t pa, u_int16_t data) { cia_swiz_set_hae_mem(&pa); SPARSE_WRITE_WORD(KV(CIA_PCI_SMEM1), pa, data); alpha_wmb(); } static void cia_swiz_writel(u_int32_t pa, u_int32_t data) { cia_swiz_set_hae_mem(&pa); SPARSE_WRITE_LONG(KV(CIA_PCI_SMEM1), pa, data); alpha_wmb(); } static int cia_swiz_maxdevs(u_int b) { return 12; /* XXX */ } #define CIA_SWIZ_CFGOFF(b, s, f, r) \ (((b) << 16) | ((s) << 11) | ((f) << 8) | (r)) /* when doing a type 1 pci configuration space access, we * must set a bit in the CIA_CSR_CFG register & clear it * when we're done */ #define CIA_TYPE1_SETUP(b,s,old_cfg) if((b)) { \ do { \ (s) = splhigh(); \ (old_cfg) = REGVAL(CIA_CSR_CFG); \ alpha_mb(); \ REGVAL(CIA_CSR_CFG) = (old_cfg) | 0x1; \ alpha_mb(); \ } while(0); \ } #define CIA_TYPE1_TEARDOWN(b,s,old_cfg) if((b)) { \ do { \ alpha_mb(); \ REGVAL(CIA_CSR_CFG) = (old_cfg); \ alpha_mb(); \ splx((s)); \ } while(0); \ } #define SWIZ_CFGREAD(b, s, f, r, width, type) \ type val = ~0; \ int ipl = 0; \ u_int32_t old_cfg = 0; \ vm_offset_t off = CIA_SWIZ_CFGOFF(b, s, f, r); \ vm_offset_t kv = SPARSE_##width##_ADDRESS(KV(CIA_PCI_CONF), off); \ alpha_mb(); \ CIA_TYPE1_SETUP(b,ipl,old_cfg); \ if (!badaddr((caddr_t)kv, sizeof(type))) { \ val = SPARSE_##width##_EXTRACT(off, SPARSE_READ(kv)); \ } \ CIA_TYPE1_TEARDOWN(b,ipl,old_cfg); \ return val; #define SWIZ_CFGWRITE(b, s, f, r, data, width, type) \ int ipl = 0; \ u_int32_t old_cfg = 0; \ vm_offset_t off = CIA_SWIZ_CFGOFF(b, s, f, r); \ vm_offset_t kv = SPARSE_##width##_ADDRESS(KV(CIA_PCI_CONF), off); \ alpha_mb(); \ CIA_TYPE1_SETUP(b,ipl,old_cfg); \ if (!badaddr((caddr_t)kv, sizeof(type))) { \ SPARSE_WRITE(kv, SPARSE_##width##_INSERT(off, data)); \ alpha_wmb(); \ } \ CIA_TYPE1_TEARDOWN(b,ipl,old_cfg); \ return; static u_int8_t cia_swiz_cfgreadb(u_int b, u_int s, u_int f, u_int r) { SWIZ_CFGREAD(b, s, f, r, BYTE, u_int8_t); } static u_int16_t cia_swiz_cfgreadw(u_int b, u_int s, u_int f, u_int r) { SWIZ_CFGREAD(b, s, f, r, WORD, u_int16_t); } static u_int32_t cia_swiz_cfgreadl(u_int b, u_int s, u_int f, u_int r) { SWIZ_CFGREAD(b, s, f, r, LONG, u_int32_t); } static void cia_swiz_cfgwriteb(u_int b, u_int s, u_int f, u_int r, u_int8_t data) { SWIZ_CFGWRITE(b, s, f, r, data, BYTE, u_int8_t); } static void cia_swiz_cfgwritew(u_int b, u_int s, u_int f, u_int r, u_int16_t data) { SWIZ_CFGWRITE(b, s, f, r, data, WORD, u_int16_t); } static void cia_swiz_cfgwritel(u_int b, u_int s, u_int f, u_int r, u_int32_t data) { SWIZ_CFGWRITE(b, s, f, r, data, LONG, u_int32_t); } vm_offset_t cia_cvt_dense(vm_offset_t addr) { addr &= 0xffffffffUL; return (addr | CIA_PCI_DENSE); } vm_offset_t cia_cvt_bwx(vm_offset_t addr) { addr &= 0xffffffffUL; return (addr |= CIA_EV56_BWMEM); } static u_int64_t cia_read_hae(void) { return cia_hae_mem & REG1; } static void cia_write_hae(u_int64_t hae) { u_int32_t pa = hae; cia_swiz_set_hae_mem(&pa); } static int cia_probe(device_t dev); static int cia_attach(device_t dev); static int cia_setup_intr(device_t dev, device_t child, struct resource *irq, driver_intr_t *intr, void *arg, void **cookiep); static int cia_teardown_intr(device_t dev, device_t child, struct resource *irq, void *cookie); static device_method_t cia_methods[] = { /* Device interface */ DEVMETHOD(device_probe, cia_probe), DEVMETHOD(device_attach, cia_attach), /* Bus interface */ DEVMETHOD(bus_alloc_resource, pci_alloc_resource), DEVMETHOD(bus_release_resource, pci_release_resource), DEVMETHOD(bus_activate_resource, pci_activate_resource), DEVMETHOD(bus_deactivate_resource, pci_deactivate_resource), DEVMETHOD(bus_setup_intr, cia_setup_intr), DEVMETHOD(bus_teardown_intr, cia_teardown_intr), { 0, 0 } }; static driver_t cia_driver = { "cia", cia_methods, DRIVER_TYPE_MISC, sizeof(struct cia_softc), }; void cia_init() { static int initted = 0; if (initted) return; initted = 1; cia_rev = REGVAL(CIA_CSR_REV) & REV_MASK; /* * Determine if we have a Pyxis. Only two systypes can * have this: the EB164 systype (AlphaPC164LX and AlphaPC164SX) * and the DEC_ST550 systype (Miata). */ if ((hwrpb->rpb_type == ST_EB164 && (hwrpb->rpb_variation & SV_ST_MASK) >= SV_ST_ALPHAPC164LX_400) || hwrpb->rpb_type == ST_DEC_550) cia_ispyxis = TRUE; else cia_ispyxis = FALSE; /* * ALCOR/ALCOR2 Revisions >= 2 and Pyxis have the CNFG register. */ if (cia_rev >= 2 || cia_ispyxis) cia_config = REGVAL(CIA_CSR_CNFG); else cia_config = 0; if (alpha_implver() != ALPHA_IMPLVER_EV5 || alpha_amask(ALPHA_AMASK_BWX) || !(cia_config & CNFG_BWEN)) chipset = cia_swiz_chipset; else chipset = cia_bwx_chipset; cia_hae_mem = REGVAL(CIA_CSR_HAE_MEM); #if 0 chipset = cia_swiz_chipset; /* XXX */ cia_ispyxis = 0; #endif if (platform.pci_intr_init) platform.pci_intr_init(); } static int cia_probe(device_t dev) { if (cia0) return ENXIO; cia0 = dev; device_set_desc(dev, "2117x PCI adapter"); /* XXX */ pci_init_resources(); device_add_child(dev, "isa", 0, 0); return 0; } static int cia_attach(device_t dev) { struct cia_softc* sc = CIA_SOFTC(dev); char* name; int pass; cia_init(); chipset.intrdev = dev; name = cia_ispyxis ? "Pyxis" : "ALCOR/ALCOR2"; if (cia_ispyxis) { name = "Pyxis"; pass = cia_rev; } else { name = "ALCOR/ALCOR2"; pass = cia_rev+1; } printf("cia0: %s, pass %d\n", name, pass); if (cia_config) printf("cia0: extended capabilities: %b\n", cia_config, CIA_CSR_CNFG_BITS); #ifdef DEC_ST550 if (hwrpb->rpb_type == ST_DEC_550 && (hwrpb->rpb_variation & SV_ST_MASK) < SV_ST_MIATA_1_5) { /* * Miata 1 systems have a bug: DMA cannot cross * an 8k boundary! Make sure PCI read prefetching * is disabled on these chips. Note that secondary * PCI busses don't have this problem, because of * the way PPBs handle PCI read requests. * * In the 21174 Technical Reference Manual, this is * actually documented as "Pyxis Pass 1", but apparently * there are chips that report themselves as "Pass 1" * which do not have the bug! Miatas with the Cypress * PCI-ISA bridge (i.e. Miata 1.5 and Miata 2) do not * have the bug, so we use this check. * * XXX We also need to deal with this boundary constraint * XXX in the PCI bus 0 (and ISA) DMA tags, but some * XXX drivers are going to need to be changed first. */ u_int32_t ctrl; /* XXX no bets... */ printf("cia0: WARNING: Pyxis pass 1 DMA bug; no bets...\n"); alpha_mb(); ctrl = REGVAL(CIA_CSR_CTRL); ctrl &= ~(CTRL_RD_TYPE|CTRL_RL_TYPE|CTRL_RM_TYPE); REGVAL(CIA_CSR_CTRL) = ctrl; alpha_mb(); } #endif if (!platform.iointr) /* XXX */ set_iointr(alpha_dispatch_intr); if (cia_ispyxis) { snprintf(chipset_type, sizeof(chipset_type), "pyxis"); chipset_bwx = 1; chipset_ports = CIA_EV56_BWIO; chipset_memory = CIA_EV56_BWMEM; chipset_dense = CIA_PCI_DENSE; } else { snprintf(chipset_type, sizeof(chipset_type), "cia"); chipset_bwx = 0; chipset_ports = CIA_PCI_SIO1; chipset_memory = CIA_PCI_SMEM1; chipset_dense = CIA_PCI_DENSE; chipset_hae_mask = 7L << 29; } bus_generic_attach(dev); return 0; } static int cia_setup_intr(device_t dev, device_t child, struct resource *irq, driver_intr_t *intr, void *arg, void **cookiep) { int error; error = rman_activate_resource(irq); if (error) return error; error = alpha_setup_intr(0x900 + (irq->r_start << 4), intr, arg, cookiep, &intrcnt[INTRCNT_EB164_IRQ + irq->r_start]); if (error) return error; /* Enable PCI interrupt */ platform.pci_intr_enable(irq->r_start); return 0; } static int cia_teardown_intr(device_t dev, device_t child, struct resource *irq, void *cookie) { alpha_teardown_intr(cookie); return rman_deactivate_resource(irq); } DRIVER_MODULE(cia, root, cia_driver, cia_devclass, 0, 0);