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[src/trunk]: src/sys/arch/evbarm/rpi Add the Raspberry PI firmware VC mailbox...
details: https://anonhg.NetBSD.org/src/rev/ca94d00736d5
branches: trunk
changeset: 782073:ca94d00736d5
user: skrll <skrll%NetBSD.org@localhost>
date: Sun Oct 14 16:16:52 2012 +0000
description:
Add the Raspberry PI firmware VC mailbox channel numbers.
Add some VC property tag definitions and use them to get ARM/VC memory
split.
Grab a few others things in the process, but don't do anything other than
display them when VERBOSE_INIT_ARM is defined.
diffstat:
sys/arch/evbarm/rpi/rpi_machdep.c | 220 +++++++++++++++++++++++++------------
sys/arch/evbarm/rpi/vcio.h | 45 +++++++
sys/arch/evbarm/rpi/vcprop.h | 149 +++++++++++++++++++++++++
3 files changed, 340 insertions(+), 74 deletions(-)
diffs (truncated from 483 to 300 lines):
diff -r 81a8bdb5db95 -r ca94d00736d5 sys/arch/evbarm/rpi/rpi_machdep.c
--- a/sys/arch/evbarm/rpi/rpi_machdep.c Sun Oct 14 14:20:57 2012 +0000
+++ b/sys/arch/evbarm/rpi/rpi_machdep.c Sun Oct 14 16:16:52 2012 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: rpi_machdep.c,v 1.12 2012/10/13 14:22:12 skrll Exp $ */
+/* $NetBSD: rpi_machdep.c,v 1.13 2012/10/14 16:16:52 skrll Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: rpi_machdep.c,v 1.12 2012/10/13 14:22:12 skrll Exp $");
+__KERNEL_RCSID(0, "$NetBSD: rpi_machdep.c,v 1.13 2012/10/14 16:16:52 skrll Exp $");
#include "opt_evbarm_boardtype.h"
@@ -49,8 +49,13 @@
#include <machine/bootconfig.h>
#include <machine/pmap.h>
+#include <arm/broadcom/bcm2835reg.h>
#include <arm/broadcom/bcm2835var.h>
#include <arm/broadcom/bcm2835_pmvar.h>
+#include <arm/broadcom/bcm2835_mbox.h>
+
+#include <evbarm/rpi/vcio.h>
+#include <evbarm/rpi/vcprop.h>
#include <evbarm/rpi/rpi.h>
@@ -66,11 +71,16 @@
static char bootargs[MAX_BOOT_STRING];
char *boot_args = NULL;
+void rpi_bootparams(void);
+
/*
* Macros to translate between physical and virtual for a subset of the
* kernel address space. *Not* for general use.
*/
-#define KERNEL_BASE_PHYS (paddr_t)0
+#define KERNEL_BASE_PHYS (paddr_t)0
+
+#define KERN_VTOPHYS(va) \
+ ((paddr_t)((vaddr_t)va - KERNEL_BASE + KERNEL_BASE_PHYS))
#define KERN_PHYSTOV(pa) \
((vaddr_t)((paddr_t)pa - KERNEL_BASE_PHYS + KERNEL_BASE))
@@ -103,7 +113,137 @@
#endif
/* Smallest amount of RAM start.elf could give us. */
-#define RPI_MINIMUM_ARM_RAM_SPLIT (128U * 1024 * 1024)
+#define RPI_MINIMUM_SPLIT (128U * 1024 * 1024)
+
+static struct {
+ struct vcprop_buffer_hdr vb_hdr;
+ struct vcprop_tag_fwrev vbt_fwrev;
+ struct vcprop_tag_boardmodel vbt_boardmodel;
+ struct vcprop_tag_boardrev vbt_boardrev;
+ struct vcprop_tag_macaddr vbt_macaddr;
+ struct vcprop_tag_memory vbt_memory;
+ struct vcprop_tag_boardserial vbt_serial;
+ struct vcprop_tag_cmdline vbt_cmdline;
+ struct vcprop_tag end;
+} vb __packed __aligned(16) =
+{
+ .vb_hdr = {
+ .vpb_len = sizeof(vb),
+ .vpb_rcode = VCPROP_PROCESS_REQUEST,
+ },
+ .vbt_fwrev = {
+ .tag = {
+ .vpt_tag = VCPROPTAG_GET_FIRMWAREREV,
+ .vpt_len = VCPROPTAG_LEN(vb.vbt_fwrev),
+ .vpt_rcode = VCPROPTAG_REQUEST
+ },
+ },
+ .vbt_boardmodel = {
+ .tag = {
+ .vpt_tag = VCPROPTAG_GET_BOARDMODEL,
+ .vpt_len = VCPROPTAG_LEN(vb.vbt_boardmodel),
+ .vpt_rcode = VCPROPTAG_REQUEST
+ },
+ },
+ .vbt_boardrev = {
+ .tag = {
+ .vpt_tag = VCPROPTAG_GET_BOARDREVISION,
+ .vpt_len = VCPROPTAG_LEN(vb.vbt_boardrev),
+ .vpt_rcode = VCPROPTAG_REQUEST
+ },
+ },
+ .vbt_macaddr = {
+ .tag = {
+ .vpt_tag = VCPROPTAG_GET_MACADDRESS,
+ .vpt_len = VCPROPTAG_LEN(vb.vbt_macaddr),
+ .vpt_rcode = VCPROPTAG_REQUEST
+ },
+ },
+ .vbt_memory = {
+ .tag = {
+ .vpt_tag = VCPROPTAG_GET_ARMMEMORY,
+ .vpt_len = VCPROPTAG_LEN(vb.vbt_memory),
+ .vpt_rcode = VCPROPTAG_REQUEST
+ },
+ },
+ .vbt_serial = {
+ .tag = {
+ .vpt_tag = VCPROPTAG_GET_BOARDSERIAL,
+ .vpt_len = VCPROPTAG_LEN(vb.vbt_serial),
+ .vpt_rcode = VCPROPTAG_REQUEST
+ },
+ },
+ .vbt_cmdline = {
+ .tag = {
+ .vpt_tag = VCPROPTAG_GET_CMDLINE,
+ .vpt_len = VCPROPTAG_LEN(vb.vbt_cmdline),
+ .vpt_rcode = VCPROPTAG_REQUEST
+ },
+ },
+ .end = {
+ .vpt_tag = VCPROPTAG_NULL
+ }
+};
+
+void
+rpi_bootparams(void)
+{
+ bus_space_tag_t iot = &bcm2835_bs_tag;
+ bus_space_handle_t ioh = BCM2835_IOPHYSTOVIRT(BCM2835_ARMMBOX_BASE);
+ uint32_t res;
+
+ bcm2835_mbox_write(iot, ioh, BCMMBOX_CHANARM2VC, KERN_VTOPHYS(&vb));
+
+ bcm2835_mbox_read(iot, ioh, BCMMBOX_CHANARM2VC, &res);
+
+ /*
+ * No need to invalid the cache as the memory has never been referenced
+ * by the ARM.
+ *
+ * cpu_dcache_inv_range((vaddr_t)&vb, sizeof(vb));
+ *
+ */
+
+ if (!vcprop_buffer_success_p(&vb.vb_hdr)) {
+ bootconfig.dramblocks = 1;
+ bootconfig.dram[0].address = 0x0;
+ bootconfig.dram[0].pages = atop(RPI_MINIMUM_SPLIT);
+ return;
+ }
+
+ struct vcprop_tag_memory *vptp_mem = &vb.vbt_memory;
+
+ if (vcprop_tag_success_p(&vptp_mem->tag)) {
+ size_t n = vcprop_tag_resplen(&vptp_mem->tag) /
+ sizeof(struct vcprop_memory);
+
+ for (int i = 0; i < n && i < DRAM_BLOCKS; i++) {
+ bootconfig.dram[i].address = vptp_mem->mem[i].base;
+ bootconfig.dram[i].pages = atop(vptp_mem->mem[i].size);
+ }
+ }
+
+#ifdef VERBOSE_INIT_ARM
+ if (vcprop_tag_success_p(&vb.vbt_fwrev.tag))
+ printf("%s: firmware rev %x\n", __func__,
+ vb.vbt_fwrev.rev);
+ if (vcprop_tag_success_p(&vb.vbt_macaddr.tag))
+ printf("%s: mac-address %llx\n", __func__,
+ vb.vbt_macaddr.addr);
+ if (vcprop_tag_success_p(&vb.vbt_boardmodel.tag))
+ printf("%s: board model %x\n", __func__,
+ vb.vbt_boardmodel.model);
+ if (vcprop_tag_success_p(&vb.vbt_boardrev.tag))
+ printf("%s: board rev %x\n", __func__,
+ vb.vbt_boardrev.rev);
+ if (vcprop_tag_success_p(&vb.vbt_serial.tag))
+ printf("%s: board serial %llx\n", __func__,
+ vb.vbt_serial.sn);
+ if (vcprop_tag_success_p(&vb.vbt_cmdline.tag))
+ printf("%s: cmdline %s\n", __func__,
+ vb.vbt_cmdline.cmdline);
+#endif
+}
/*
* Static device mappings. These peripheral registers are mapped at
@@ -137,63 +277,6 @@
#undef _A
#undef _S
-#define LINUX_ARM_MACHTYPE_BCM2708 3138
-
-#define LINUX_ATAG_NONE 0x00000000
-struct linux_atag_header {
- uint32_t size;
- uint32_t tag;
-} __packed __aligned(4);
-
-#define LINUX_ATAG_MEM 0x54410002
-struct linux_atag_mem {
- uint32_t size;
- uint32_t start;
-} __packed __aligned(4);
-
-#define LINUX_ATAG_CMDLINE 0x54410009
-struct linux_atag_cmdline {
- char cmdline[1];
-} __packed __aligned(4);
-
-struct linux_atag {
- struct linux_atag_header hdr;
- union {
- struct linux_atag_mem mem;
- struct linux_atag_cmdline cmdline;
- } u;
-} __packed __aligned(4);
-
-static void
-parse_linux_atags(void *atag_base)
-{
- struct linux_atag *atp;
-
- for (atp = atag_base;
- atp->hdr.size >= sizeof(struct linux_atag_header)/sizeof(uint32_t);
- atp = (void *)((uintptr_t)atp + sizeof(uint32_t) * atp->hdr.size)) {
- printf("atag: size %08x tag %08x\n", atp->hdr.size, atp->hdr.tag);
- if (atp->hdr.tag == LINUX_ATAG_MEM) {
- if (bootconfig.dramblocks > 1) {
- printf("Ignoring RAM block 0x%08x-0x%08x\n",
- atp->u.mem.start, atp->u.mem.start +
- atp->u.mem.size - 1);
- continue;
- }
- KASSERT(atp->u.mem.start == 0);
- bootconfig.dram[bootconfig.dramblocks].address = 0x0;
- bootconfig.dram[bootconfig.dramblocks].pages =
- atp->u.mem.size / PAGE_SIZE;
- ++bootconfig.dramblocks;
- }
-
- if (atp->hdr.tag == LINUX_ATAG_CMDLINE) {
- strncpy(bootargs, atp->u.cmdline.cmdline,
- sizeof(bootargs));
- }
- }
-}
-
/*
* u_int initarm(...)
*
@@ -229,25 +312,14 @@
#define _BDSTR(s) #s
printf("\nNetBSD/evbarm (" BDSTR(EVBARM_BOARDTYPE) ") booting ...\n");
- bootargs[0] = '\0';
+ rpi_bootparams();
#ifdef VERBOSE_INIT_ARM
printf("initarm: Configuring system ...\n");
#endif
-
- extern const uint32_t rpi_boot_regs[4];
- if (rpi_boot_regs[0] == 0 &&
- rpi_boot_regs[1] == LINUX_ARM_MACHTYPE_BCM2708) {
- parse_linux_atags((void *)KERN_PHYSTOV(rpi_boot_regs[2]));
- } else {
- bootconfig.dramblocks = 1;
-
- bootconfig.dram[0].address = 0x0;
- bootconfig.dram[0].pages =
- RPI_MINIMUM_ARM_RAM_SPLIT / PAGE_SIZE;
- }
arm32_bootmem_init(bootconfig.dram[0].address,
bootconfig.dram[0].pages * PAGE_SIZE, bootconfig.dram[0].address);
+
arm32_kernel_vm_init(KERNEL_VM_BASE, ARM_VECTORS_HIGH, 0, rpi_devmap,
false);
diff -r 81a8bdb5db95 -r ca94d00736d5 sys/arch/evbarm/rpi/vcio.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/arch/evbarm/rpi/vcio.h Sun Oct 14 16:16:52 2012 +0000
@@ -0,0 +1,45 @@
+/* $NetBSD: vcio.h,v 1.1 2012/10/14 16:16:52 skrll Exp $ */
+
+/*-
+ * Copyright (c) 2012 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Nick Hudson
+ *
+ * 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
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