* Define fixed virtual addresses for the Primary and Secondary
PCI I/O spaces, as well as the i80312 PMMRs. Map these regions in early bootstrap along with the on-board device address space. * Adjust call to i80312_sdram_bounds() for the new way the PMMRs are defined in i80312reg.h * Word around some serious braindamage in RedBoot -- RedBoot uses the on-board Ethernet to TFTP the kernel image. However, it does not stop the Ethernet before transferring control to the loaded program. This means that if it happens to receive another packet (broadcast/multicast/unicast), it will happily scribble over the memory of the new running program. Work around this problem by performing a secondary-bus-reset on the i80312's PPB. XXX This could be problematic if we ever encounter an application where the i80312's PPB is actually used as a passthrough PPB.
This commit is contained in:
thorpej
parent
64f23a2423
commit
05dfd6cada
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@ -1,4 +1,4 @@
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/* $NetBSD: iq80310_machdep.c,v 1.2 2001/11/07 00:33:24 thorpej Exp $ */
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/* $NetBSD: iq80310_machdep.c,v 1.3 2001/11/08 03:28:53 thorpej Exp $ */
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/*
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* Copyright (c) 1997,1998 Mark Brinicombe.
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@ -67,6 +67,8 @@
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#include <arm/xscale/i80312reg.h>
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#include <arm/xscale/i80312var.h>
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#include <dev/pci/ppbreg.h>
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#include <evbarm/iq80310/iq80310reg.h>
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#include <evbarm/iq80310/iq80310var.h>
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#include <evbarm/iq80310/obiovar.h>
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@ -127,7 +129,8 @@ extern int pmap_debug_level;
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#define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
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#define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */
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#define KERNEL_PT_VMDATA 2 /* Page tables for mapping kernel VM */
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#define KERNEL_PT_IOPXS 2 /* Page table for mapping i80312 */
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#define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */
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#define KERNEL_PT_VMDATA_NUM (KERNEL_VM_SIZE >> (PDSHIFT + 2))
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#define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
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@ -323,8 +326,32 @@ initarm(void)
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printf("\nNetBSD/evbarm (IQ80310) booting ...\n");
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/*
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* Okay, RedBoot has provided us with the following memory map:
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* Reset the secondary PCI bus. RedBoot doesn't stop devices
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* on the PCI bus before handing us control, so we have to
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* do this.
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*
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* XXX This is arguably a bug in RedBoot, and doing this reset
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* XXX could be problematic in the future if we encounter an
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* XXX application where the PPB in the i80312 is used as a
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* XXX PPB.
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*/
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{
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uint32_t reg;
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printf("Resetting secondary PCI bus...\n");
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reg = bus_space_read_4(&obio_bs_tag,
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I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL);
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bus_space_write_4(&obio_bs_tag,
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I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL,
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reg | PPB_BC_SECONDARY_RESET);
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delay(10 * 1000); /* 10ms enough? */
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bus_space_write_4(&obio_bs_tag,
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I80312_PMMR_BASE + I80312_PPB_BASE, PPB_REG_BRIDGECONTROL,
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reg);
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}
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/*
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* Okay, RedBoot has provided us with the following memory map:
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*
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* Physical Address Range Description
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* ----------------------- ----------------------------------
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@ -380,8 +407,8 @@ initarm(void)
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* Fetch the SDRAM start/size from the i80312 SDRAM configration
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* registers.
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*/
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i80312_sdram_bounds(&obio_bs_tag, I80312_MEM_BASE, &memstart,
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&memsize);
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i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE,
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&memstart, &memsize);
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printf("initarm: Configuring system ...\n");
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@ -528,6 +555,8 @@ initarm(void)
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kernel_pt_table[KERNEL_PT_SYS]);
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map_pagetable(l1pagetable, KERNEL_BASE,
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kernel_pt_table[KERNEL_PT_KERNEL]);
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map_pagetable(l1pagetable, IQ80310_IOPXS_VBASE,
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kernel_pt_table[KERNEL_PT_IOPXS]);
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for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
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map_pagetable(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
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kernel_pt_table[KERNEL_PT_VMDATA + loop]);
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@ -614,7 +643,9 @@ initarm(void)
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l2pagetable = kernel_pt_table[KERNEL_PT_SYS];
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map_entry(l2pagetable, 0x00000000, systempage.pv_pa);
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/* Map the core memory needed before autoconfig */
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/*
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* Map devices we can map w/ section mappings.
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*/
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loop = 0;
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while (l1_sec_table[loop].size) {
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vm_size_t sz;
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@ -631,6 +662,38 @@ initarm(void)
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++loop;
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}
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/*
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* Map the PCI I/O spaces and i80312 registers. These are too
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* small to be mapped w/ section mappings.
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*/
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l2pagetable = kernel_pt_table[KERNEL_PT_IOPXS];
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#ifdef VERBOSE_INIT_ARM
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printf("Mapping PIOW 0x%08lx -> 0x%08lx @ 0x%08lx\n",
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I80312_PCI_XLATE_PIOW_BASE,
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I80312_PCI_XLATE_PIOW_BASE + I80312_PCI_XLATE_IOSIZE - 1,
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IQ80310_PIOW_VBASE);
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#endif
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map_chunk(0, l2pagetable, IQ80310_PIOW_VBASE,
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I80312_PCI_XLATE_PIOW_BASE, I80312_PCI_XLATE_IOSIZE, AP_KRW, 0);
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#ifdef VERBOSE_INIT_ARM
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printf("Mapping SIOW 0x%08lx -> 0x%08lx @ 0x%08lx\n",
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I80312_PCI_XLATE_SIOW_BASE,
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I80312_PCI_XLATE_SIOW_BASE + I80312_PCI_XLATE_IOSIZE - 1,
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IQ80310_SIOW_VBASE);
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#endif
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map_chunk(0, l2pagetable, IQ80310_SIOW_VBASE,
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I80312_PCI_XLATE_SIOW_BASE, I80312_PCI_XLATE_IOSIZE, AP_KRW, 0);
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#ifdef VERBOSE_INIT_ARM
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printf("Mapping SIOW 0x%08lx -> 0x%08lx @ 0x%08lx\n",
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I80312_PMMR_BASE,
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I80312_PMMR_BASE + I80312_PMMR_SIZE - 1,
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IQ80310_80312_VBASE);
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#endif
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map_chunk(0, l2pagetable, IQ80310_80312_VBASE,
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I80312_PMMR_BASE, I80312_PMMR_SIZE, AP_KRW, 0);
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/*
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* Now we have the real page tables in place so we can switch to them.
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* Once this is done we will be running with the REAL kernel page
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@ -1,4 +1,4 @@
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/* $NetBSD: iq80310reg.h,v 1.2 2001/11/07 02:24:18 thorpej Exp $ */
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/* $NetBSD: iq80310reg.h,v 1.3 2001/11/08 03:28:53 thorpej Exp $ */
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/*
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* Copyright (c) 2001 Wasabi Systems, Inc.
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@ -79,8 +79,22 @@
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#define CPLD_READ(x) *((__volatile uint8_t *)(x))
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#define CPLD_WRITE(x, v) *((__volatile uint8_t *)(x)) = (v)
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/*
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* We allocate a page table for VA 0xfe400000 (4MB) and map the i80312
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* PCI I/O space (2 * 64L) and i80312 regisers (4K) there.
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*/
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#define IQ80310_IOPXS_VBASE 0xfe400000UL
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#define IQ80310_PIOW_VBASE IQ80310_IOPXS_VBASE
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#define IQ80310_SIOW_VBASE (IQ80310_PIOW_VBASE + I80312_PCI_XLATE_IOSIZE)
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#define IQ80310_80312_VBASE (IQ80310_SIOW_VBASE + I80312_PCI_XLATE_IOSIZE)
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/*
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* The IQ80310 on-board devices are mapped VA==PA during bootstrap.
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* Conveniently, the size of the on-board register space is 1 section
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* mapping.
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*/
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#define IQ80310_OBIO_BASE 0xfe800000UL
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#define IQ80310_OBIO_SIZE 0x00100000UL
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#define IQ80310_OBIO_SIZE 0x00100000UL /* 1MB */
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#define IQ80310_UART1 0xfe800000UL /* XR 16550 */
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