svn commit: r317873 - in head/sys: conf dev/rt gnu/dts/mips mips/conf mips/mediatek
Adrian Chadd
adrian at FreeBSD.org
Sat May 6 06:20:37 UTC 2017
Author: adrian
Date: Sat May 6 06:20:34 2017
New Revision: 317873
URL: https://svnweb.freebsd.org/changeset/base/317873
Log:
[mips] [rt2880] Add oldest Ralink MIPS SOC RT2880 support code.
* Target module have ic plus etherswitch ip175c.
* Also add etherswitch support code on rt driver.
Reviewed by: mizhka
Differential Revision: https://reviews.freebsd.org/D10336
Added:
head/sys/gnu/dts/mips/MZK-W04N-XX.dts (contents, props changed)
head/sys/mips/conf/RT2880_FDT (contents, props changed)
head/sys/mips/mediatek/std.rt2880 (contents, props changed)
Modified:
head/sys/conf/options.mips
head/sys/dev/rt/if_rt.c
head/sys/dev/rt/if_rtreg.h
head/sys/gnu/dts/mips/rt2880.dtsi
head/sys/mips/mediatek/mtk_machdep.c
head/sys/mips/mediatek/mtk_soc.c
head/sys/mips/mediatek/mtk_soc.h
Modified: head/sys/conf/options.mips
==============================================================================
--- head/sys/conf/options.mips Sat May 6 06:14:46 2017 (r317872)
+++ head/sys/conf/options.mips Sat May 6 06:20:34 2017 (r317873)
@@ -152,6 +152,7 @@ RT3050F opt_rt305x.h
RT305X opt_rt305x.h
RT305X_UBOOT opt_rt305x.h
RT305X_USE_UART opt_rt305x.h
+RT_MDIO opt_rt305x.h
#
# Options that affect the pmap.
Modified: head/sys/dev/rt/if_rt.c
==============================================================================
--- head/sys/dev/rt/if_rt.c Sat May 6 06:14:46 2017 (r317872)
+++ head/sys/dev/rt/if_rt.c Sat May 6 06:20:34 2017 (r317873)
@@ -70,6 +70,12 @@ __FBSDID("$FreeBSD$");
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
+#ifdef RT_MDIO
+#include <dev/mdio/mdio.h>
+#include <dev/etherswitch/miiproxy.h>
+#include "mdio_if.h"
+#endif
+
#if 0
#include <mips/rt305x/rt305x_sysctlvar.h>
#include <mips/rt305x/rt305xreg.h>
@@ -91,6 +97,7 @@ __FBSDID("$FreeBSD$");
#define RT_TX_WATCHDOG_TIMEOUT 5
+#define RT_CHIPID_RT2880 0x2880
#define RT_CHIPID_RT3050 0x3050
#define RT_CHIPID_RT5350 0x5350
#define RT_CHIPID_MT7620 0x7620
@@ -99,6 +106,7 @@ __FBSDID("$FreeBSD$");
#ifdef FDT
/* more specific and new models should go first */
static const struct ofw_compat_data rt_compat_data[] = {
+ { "ralink,rt2880-eth", RT_CHIPID_RT2880 },
{ "ralink,rt3050-eth", RT_CHIPID_RT3050 },
{ "ralink,rt3352-eth", RT_CHIPID_RT3050 },
{ "ralink,rt3883-eth", RT_CHIPID_RT3050 },
@@ -166,6 +174,8 @@ static void rt_dma_map_addr(void *arg, b
static void rt_sysctl_attach(struct rt_softc *sc);
#ifdef IF_RT_PHY_SUPPORT
void rt_miibus_statchg(device_t);
+#endif
+#if defined(IF_RT_PHY_SUPPORT) || defined(RT_MDIO)
static int rt_miibus_readreg(device_t, int, int);
static int rt_miibus_writereg(device_t, int, int, int);
#endif
@@ -351,7 +361,7 @@ rt_attach(device_t dev)
sc->mem_rid = 0;
sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->mem_rid,
- RF_ACTIVE);
+ RF_ACTIVE | RF_SHAREABLE);
if (sc->mem == NULL) {
device_printf(dev, "could not allocate memory resource\n");
error = ENXIO;
@@ -467,6 +477,9 @@ rt_attach(device_t dev)
GDM_DST_PORT_CPU << GDM_OFRC_P_SHIFT /* fwd Other to CPU */
));
+ if (sc->rt_chipid == RT_CHIPID_RT2880)
+ RT_WRITE(sc, MDIO_CFG, MDIO_2880_100T_INIT);
+
/* allocate Tx and Rx rings */
for (i = 0; i < RT_SOFTC_TX_RING_COUNT; i++) {
error = rt_alloc_tx_ring(sc, &sc->tx_ring[i], i);
@@ -2733,16 +2746,20 @@ rt_sysctl_attach(struct rt_softc *sc)
"Tx collision count for GDMA ports");
}
-#ifdef IF_RT_PHY_SUPPORT
+#if defined(IF_RT_PHY_SUPPORT) || defined(RT_MDIO)
+/* This code is only work RT2880 and same chip. */
+/* TODO: make RT3052 and later support code. But nobody need it? */
static int
rt_miibus_readreg(device_t dev, int phy, int reg)
{
struct rt_softc *sc = device_get_softc(dev);
+ int dat;
/*
* PSEUDO_PHYAD is a special value for indicate switch attached.
* No one PHY use PSEUDO_PHYAD (0x1e) address.
*/
+#ifndef RT_MDIO
if (phy == 31) {
/* Fake PHY ID for bfeswitch attach */
switch (reg) {
@@ -2754,13 +2771,14 @@ rt_miibus_readreg(device_t dev, int phy,
return (0x6250); /* bfeswitch */
}
}
+#endif
/* Wait prev command done if any */
while (RT_READ(sc, MDIO_ACCESS) & MDIO_CMD_ONGO);
- RT_WRITE(sc, MDIO_ACCESS,
- MDIO_CMD_ONGO ||
- ((phy << MDIO_PHY_ADDR_SHIFT) & MDIO_PHY_ADDR_MASK) ||
- ((reg << MDIO_PHYREG_ADDR_SHIFT) & MDIO_PHYREG_ADDR_MASK));
+ dat = ((phy << MDIO_PHY_ADDR_SHIFT) & MDIO_PHY_ADDR_MASK) |
+ ((reg << MDIO_PHYREG_ADDR_SHIFT) & MDIO_PHYREG_ADDR_MASK);
+ RT_WRITE(sc, MDIO_ACCESS, dat);
+ RT_WRITE(sc, MDIO_ACCESS, dat | MDIO_CMD_ONGO);
while (RT_READ(sc, MDIO_ACCESS) & MDIO_CMD_ONGO);
return (RT_READ(sc, MDIO_ACCESS) & MDIO_PHY_DATA_MASK);
@@ -2770,19 +2788,23 @@ static int
rt_miibus_writereg(device_t dev, int phy, int reg, int val)
{
struct rt_softc *sc = device_get_softc(dev);
+ int dat;
/* Wait prev command done if any */
while (RT_READ(sc, MDIO_ACCESS) & MDIO_CMD_ONGO);
- RT_WRITE(sc, MDIO_ACCESS,
- MDIO_CMD_ONGO || MDIO_CMD_WR ||
- ((phy << MDIO_PHY_ADDR_SHIFT) & MDIO_PHY_ADDR_MASK) ||
- ((reg << MDIO_PHYREG_ADDR_SHIFT) & MDIO_PHYREG_ADDR_MASK) ||
- (val & MDIO_PHY_DATA_MASK));
+ dat = MDIO_CMD_WR |
+ ((phy << MDIO_PHY_ADDR_SHIFT) & MDIO_PHY_ADDR_MASK) |
+ ((reg << MDIO_PHYREG_ADDR_SHIFT) & MDIO_PHYREG_ADDR_MASK) |
+ (val & MDIO_PHY_DATA_MASK);
+ RT_WRITE(sc, MDIO_ACCESS, dat);
+ RT_WRITE(sc, MDIO_ACCESS, dat | MDIO_CMD_ONGO);
while (RT_READ(sc, MDIO_ACCESS) & MDIO_CMD_ONGO);
return (0);
}
+#endif
+#ifdef IF_RT_PHY_SUPPORT
void
rt_miibus_statchg(device_t dev)
{
@@ -2842,3 +2864,85 @@ DRIVER_MODULE(rt, simplebus, rt_driver,
MODULE_DEPEND(rt, ether, 1, 1, 1);
MODULE_DEPEND(rt, miibus, 1, 1, 1);
+#ifdef RT_MDIO
+MODULE_DEPEND(rt, mdio, 1, 1, 1);
+
+static int rtmdio_probe(device_t);
+static int rtmdio_attach(device_t);
+static int rtmdio_detach(device_t);
+
+static struct mtx miibus_mtx;
+
+MTX_SYSINIT(miibus_mtx, &miibus_mtx, "rt mii lock", MTX_DEF);
+
+/*
+ * Declare an additional, separate driver for accessing the MDIO bus.
+ */
+static device_method_t rtmdio_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, rtmdio_probe),
+ DEVMETHOD(device_attach, rtmdio_attach),
+ DEVMETHOD(device_detach, rtmdio_detach),
+
+ /* bus interface */
+ DEVMETHOD(bus_add_child, device_add_child_ordered),
+
+ /* MDIO access */
+ DEVMETHOD(mdio_readreg, rt_miibus_readreg),
+ DEVMETHOD(mdio_writereg, rt_miibus_writereg),
+};
+
+DEFINE_CLASS_0(rtmdio, rtmdio_driver, rtmdio_methods,
+ sizeof(struct rt_softc));
+static devclass_t rtmdio_devclass;
+
+DRIVER_MODULE(miiproxy, rt, miiproxy_driver, miiproxy_devclass, 0, 0);
+DRIVER_MODULE(rtmdio, simplebus, rtmdio_driver, rtmdio_devclass, 0, 0);
+DRIVER_MODULE(mdio, rtmdio, mdio_driver, mdio_devclass, 0, 0);
+
+static int
+rtmdio_probe(device_t dev)
+{
+ if (!ofw_bus_status_okay(dev))
+ return (ENXIO);
+
+ if (!ofw_bus_is_compatible(dev, "ralink,rt2880-mdio"))
+ return (ENXIO);
+
+ device_set_desc(dev, "FV built-in ethernet interface, MDIO controller");
+ return(0);
+}
+
+static int
+rtmdio_attach(device_t dev)
+{
+ struct rt_softc *sc;
+ int error;
+
+ sc = device_get_softc(dev);
+ sc->dev = dev;
+ sc->mem_rid = 0;
+ sc->mem = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
+ &sc->mem_rid, RF_ACTIVE | RF_SHAREABLE);
+ if (sc->mem == NULL) {
+ device_printf(dev, "couldn't map memory\n");
+ error = ENXIO;
+ goto fail;
+ }
+
+ sc->bst = rman_get_bustag(sc->mem);
+ sc->bsh = rman_get_bushandle(sc->mem);
+
+ bus_generic_probe(dev);
+ bus_enumerate_hinted_children(dev);
+ error = bus_generic_attach(dev);
+fail:
+ return(error);
+}
+
+static int
+rtmdio_detach(device_t dev)
+{
+ return(0);
+}
+#endif
Modified: head/sys/dev/rt/if_rtreg.h
==============================================================================
--- head/sys/dev/rt/if_rtreg.h Sat May 6 06:14:46 2017 (r317872)
+++ head/sys/dev/rt/if_rtreg.h Sat May 6 06:20:34 2017 (r317873)
@@ -48,6 +48,10 @@
#define MDIO_PHY_DATA_MASK 0x0000ffff
#define MDIO_PHY_DATA_SHIFT 0
+#define MDIO_CFG 0x04
+#define MDIO_2880_100T_INIT 0x1001BC01
+#define MDIO_2880_GIGA_INIT 0x1F01DC01
+
#define FE_GLO_CFG 0x08 /*Frame Engine Global Configuration */
#define EXT_VLAN_TYPE_MASK 0xffff0000
#define EXT_VLAN_TYPE_SHIFT 16
Added: head/sys/gnu/dts/mips/MZK-W04N-XX.dts
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/gnu/dts/mips/MZK-W04N-XX.dts Sat May 6 06:20:34 2017 (r317873)
@@ -0,0 +1,94 @@
+/dts-v1/;
+
+#include "rt2880.dtsi"
+
+/ {
+ compatible = "MZK-WNH", "ralink,rt2880-soc";
+ model = "Planex MZK-WNH";
+
+/*
+ memory at 0 {
+ device_type = "memory";
+ reg = <0x0 0x2000000>;
+ };
+*/
+
+ cfi at 1f000000 {
+ compatible = "cfi-flash";
+ reg = <0x1f000000 0x800000>;
+ bank-width = <2>;
+ device-width = <2>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ partition at 0 {
+ label = "Bootloader";
+ reg = <0x0 0x30000>;
+ read-only;
+ };
+
+ devdata: partition at 30000 {
+ label = "Config";
+ reg = <0x00030000 0x00010000>;
+ read-only;
+ };
+
+ factory: partition at 40000 {
+ label = "Factory";
+ reg = <0x00040000 0x00010000>;
+ read-only;
+ };
+ kernel: partition at 50000 {
+ label = "kernel";
+ reg = <0x00050000 0x000f0000>;
+ read-only;
+ };
+ rootfs: partition at 160000 {
+ label = "rootfs";
+ reg = <0x00140000 0x002c0000>;
+ read-only;
+ };
+ upgrade: partition at 400000 {
+ label = "upgrade";
+ reg = <0x00050000 0x003b0000>;
+ read-only;
+ };
+
+ };
+
+ gpio-leds {
+ compatible = "gpio-leds";
+
+ status {
+ label = "status";
+ gpios = <&gpio0 12 0>;
+ };
+
+ };
+ gpio-keys-polled {
+ compatible = "gpio-keys-polled";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ poll-interval = <20>;
+
+ reset {
+ label = "reset";
+ gpios = <&gpio0 10 1>;
+ linux,code = <0x198>;
+ };
+
+ };
+
+ ip17x at 0 {
+ compatible = "icplus,ip17x";
+ };
+
+};
+
+ðernet {
+ mtd-mac-address = <&factory 0x28>;
+};
+
+&wmac {
+ ralink,mtd-eeprom = <&factory 0>;
+};
Modified: head/sys/gnu/dts/mips/rt2880.dtsi
==============================================================================
--- head/sys/gnu/dts/mips/rt2880.dtsi Sat May 6 06:14:46 2017 (r317872)
+++ head/sys/gnu/dts/mips/rt2880.dtsi Sat May 6 06:20:34 2017 (r317873)
@@ -5,7 +5,7 @@
cpus {
cpu at 0 {
- compatible = "mips,mips24KEc";
+ compatible = "mips,mips4KEc";
};
};
@@ -80,6 +80,9 @@
ralink,register-map = [ 00 04 08 0c
20 24 28 2c
30 34 ];
+
+ interrupt-parent = <&intc>;
+ interrupts = <7>;
};
gpio1: gpio at 638 {
@@ -182,13 +185,13 @@
compatible = "ralink,rt2880-port", "mediatek,eth-port";
reg = <0>;
};
+ };
- mdio-bus {
- #address-cells = <1>;
- #size-cells = <0>;
-
- status = "disabled";
- };
+ mdio-bus {
+ compatible = "ralink,rt2880-mdio";
+ reg = <0x00400000 0x10000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
};
wmac: wmac at 480000 {
Added: head/sys/mips/conf/RT2880_FDT
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/conf/RT2880_FDT Sat May 6 06:20:34 2017 (r317873)
@@ -0,0 +1,77 @@
+#
+# RT2880_FDT -- Kernel configuration file for FreeBSD/MIPS RT2880 SoC
+#
+# This includes all the configurable parts of the kernel.
+#
+# $FreeBSD$
+#
+
+#NO_UNIVERSE
+
+#
+# FDT_DTS_FILE should be modified to suit the target board type.
+#
+#makeoptions FDT_DTS_FILE=MZK-W04N-XX.dts
+
+# Start with a base configuration
+include "../mediatek/std.rt2880"
+
+ident RT2880
+cpu CPU_MIPS4KC
+
+# Don't build any modules by default
+makeoptions MODULES_OVERRIDE=""
+
+# Default rootfs device configuration, should be changed to suit target board
+options ROOTDEVNAME=\""ufs:md0.uzip\"
+
+# Support geom_uzip(4) compressed disk images
+device geom_map
+options GEOM_UZIP
+
+# Support md(4) and md-based rootfs
+device md
+options MD_ROOT
+
+# Interrupt controller support
+device mtk_intr_v1
+
+# UART device support
+nodevice uart_ns8250
+device uart_dev_mtk
+
+# SPI and SPI flash support
+device mtk_spi_v1
+device spibus
+device mx25l
+
+# CFI support
+device cfi
+device cfid
+
+# GPIO and gpioled support
+device mtk_gpio_v1
+device gpio
+device gpioled
+
+# USB (dwcotg) support
+device usb
+device mtk_usb_phy
+device dwcotg
+
+# USB umass(4) storage and da(4) support
+device umass
+device da
+
+# CAM support, required if umass(4) is enabled above
+device pass
+device scbus
+
+# Ethernet, BPF and bridge support
+device rt
+device bpf
+device if_bridge
+
+# Extres
+options EXT_RESOURCES
+device clk
Modified: head/sys/mips/mediatek/mtk_machdep.c
==============================================================================
--- head/sys/mips/mediatek/mtk_machdep.c Sat May 6 06:14:46 2017 (r317872)
+++ head/sys/mips/mediatek/mtk_machdep.c Sat May 6 06:20:34 2017 (r317873)
@@ -146,7 +146,11 @@ mips_init(void)
ctob(physmem) / (1024 * 1024));
}
- if (ctob(physmem) < (448 * 1024 * 1024)) {
+ if (mtk_soc_get_socid() == MTK_SOC_RT2880) {
+ /* RT2880 memory start is 88000000 */
+ dump_avail[1] = phys_avail[1] = ctob(physmem)
+ + 0x08000000;
+ } else if (ctob(physmem) < (448 * 1024 * 1024)) {
/*
* Anything up to 448MB is assumed to be directly
* mappable as low memory...
Modified: head/sys/mips/mediatek/mtk_soc.c
==============================================================================
--- head/sys/mips/mediatek/mtk_soc.c Sat May 6 06:14:46 2017 (r317872)
+++ head/sys/mips/mediatek/mtk_soc.c Sat May 6 06:20:34 2017 (r317873)
@@ -53,6 +53,7 @@ static uint32_t mtk_soc_cpuclk = MTK_CPU
static uint32_t mtk_soc_timerclk = MTK_CPU_CLK_880MHZ / 2;
static const struct ofw_compat_data compat_data[] = {
+ { "ralink,rt2880-soc", MTK_SOC_RT2880 },
{ "ralink,rt3050-soc", MTK_SOC_RT3050 },
{ "ralink,rt3052-soc", MTK_SOC_RT3052 },
{ "ralink,rt3350-soc", MTK_SOC_RT3350 },
@@ -77,6 +78,30 @@ static const struct ofw_compat_data comp
};
static uint32_t
+mtk_detect_cpuclk_rt2880(bus_space_tag_t bst, bus_space_handle_t bsh)
+{
+ uint32_t val;
+
+ val = bus_space_read_4(bst, bsh, SYSCTL_SYSCFG);
+ val >>= RT2880_CPU_CLKSEL_OFF;
+ val &= RT2880_CPU_CLKSEL_MSK;
+
+ switch (val) {
+ case 0:
+ return (MTK_CPU_CLK_250MHZ);
+ case 1:
+ return (MTK_CPU_CLK_266MHZ);
+ case 2:
+ return (MTK_CPU_CLK_280MHZ);
+ case 3:
+ return (MTK_CPU_CLK_300MHZ);
+ }
+
+ /* Never reached */
+ return (0);
+}
+
+static uint32_t
mtk_detect_cpuclk_rt305x(bus_space_tag_t bst, bus_space_handle_t bsh)
{
uint32_t val;
@@ -260,7 +285,9 @@ mtk_soc_try_early_detect(void)
}
bst = fdtbus_bs_tag;
- if (mtk_soc_socid == MTK_SOC_MT7621)
+ if (mtk_soc_socid == MTK_SOC_RT2880)
+ base = MTK_RT2880_BASE;
+ else if (mtk_soc_socid == MTK_SOC_MT7621)
base = MTK_MT7621_BASE;
else
base = MTK_DEFAULT_BASE;
@@ -270,6 +297,9 @@ mtk_soc_try_early_detect(void)
/* First, figure out the CPU clock */
switch (mtk_soc_socid) {
+ case MTK_SOC_RT2880:
+ mtk_soc_cpuclk = mtk_detect_cpuclk_rt2880(bst, bsh);
+ break;
case MTK_SOC_RT3050: /* fallthrough */
case MTK_SOC_RT3052:
case MTK_SOC_RT3350:
@@ -327,6 +357,9 @@ mtk_soc_try_early_detect(void)
}
switch (mtk_soc_socid) {
+ case MTK_SOC_RT2880:
+ mtk_soc_uartclk = mtk_soc_cpuclk / MTK_UARTDIV_2;
+ break;
case MTK_SOC_RT3350: /* fallthrough */
case MTK_SOC_RT3050: /* fallthrough */
case MTK_SOC_RT3052:
Modified: head/sys/mips/mediatek/mtk_soc.h
==============================================================================
--- head/sys/mips/mediatek/mtk_soc.h Sat May 6 06:14:46 2017 (r317872)
+++ head/sys/mips/mediatek/mtk_soc.h Sat May 6 06:20:34 2017 (r317873)
@@ -32,6 +32,7 @@
enum mtk_soc_id {
MTK_SOC_UNKNOWN,
+ MTK_SOC_RT2880,
MTK_SOC_RT3050,
MTK_SOC_RT3052,
MTK_SOC_RT3350,
@@ -47,6 +48,8 @@ enum mtk_soc_id {
MTK_SOC_MAX
};
+#define RT2880_CPU_CLKSEL_OFF 20
+#define RT2880_CPU_CLKSEL_MSK 0x3
#define RT305X_CPU_CLKSEL_OFF 18
#define RT305X_CPU_CLKSEL_MSK 0x1
#define RT3352_CPU_CLKSEL_OFF 8
@@ -91,7 +94,10 @@ enum mtk_soc_id {
#define MTK_MHZ(x) ((x) * 1000 * 1000)
#define MTK_CPU_CLK_UNKNOWN 0
+#define MTK_CPU_CLK_233MHZ 233333333
#define MTK_CPU_CLK_250MHZ 250000000
+#define MTK_CPU_CLK_266MHZ 266666666
+#define MTK_CPU_CLK_280MHZ 280000000
#define MTK_CPU_CLK_300MHZ 300000000
#define MTK_CPU_CLK_320MHZ 320000000
#define MTK_CPU_CLK_360MHZ 360000000
@@ -111,6 +117,7 @@ enum mtk_soc_id {
#define MTK_UARTDIV_3 3
#define MTK_DEFAULT_BASE 0x10000000
+#define MTK_RT2880_BASE 0x00300000
#define MTK_MT7621_BASE 0x1e000000
#define MTK_DEFAULT_SIZE 0x6000
Added: head/sys/mips/mediatek/std.rt2880
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/mips/mediatek/std.rt2880 Sat May 6 06:20:34 2017 (r317873)
@@ -0,0 +1,89 @@
+#
+# std.rt2880 -- Base kernel configuration file for FreeBSD/MIPS RT2800 SoC
+#
+# This includes all the required drivers for the SoCs.
+#
+# $FreeBSD$
+#
+
+# Include the standard file list for Mediatek SoCs.
+files "../mediatek/files.mediatek"
+
+# Building a mips/mipsel kernel
+machine mips mipsel
+
+# Little-endian machine
+makeoptions MIPS_LITTLE_ENDIAN=defined
+
+# Default kernel load address
+makeoptions KERNLOADADDR=0x88001000
+
+# Mediatek/Ralink SoC support depends on FDT (with static DTB for the moment)
+options FDT
+options FDT_DTB_STATIC
+
+# We rely on INTRNG code
+options INTRNG
+options MIPS_NIRQ=256
+
+# We rely on NEW_PCIB code
+options NEW_PCIB
+
+# Build kernel with gdb(1) debug symbols
+makeoptions DEBUG=-g
+
+# Support for DDB and KDB
+options DDB
+options KDB
+
+# Debugging for use in -current
+options INVARIANTS
+options INVARIANT_SUPPORT
+options WITNESS
+options WITNESS_SKIPSPIN
+options DEBUG_REDZONE
+options DEBUG_MEMGUARD
+
+# For small memory footprints
+options VM_KMEM_SIZE_SCALE=1
+
+# General options, including scheduler, etc.
+options SCHED_ULE # ULE scheduler
+options INET # InterNETworking
+#options INET6 # IPv6
+options PSEUDOFS # Pseude-filesystem framework
+options FFS # Berkeley Fast Filesystem
+#options SOFTUPDATES # Enable FFS soft updates support
+#options UFS_ACL # Support for access control lists
+#options UFS_DIRHASH # Improve big directory performance
+#options MSDOSFS # Enable support for MSDOS filesystems
+options _KPOSIX_PRIORITY_SCHEDULING # Posix P1003_1B real-time ext.
+
+#
+# Standard drivers section
+#
+# The drivers in the following section are required in order to successfully
+# compile the kernel.
+#
+
+# FDT clock and pinctrl framework
+device fdt_clock
+device fdt_pinctrl
+
+# UART support
+device uart
+
+# random support
+device random
+
+# loop device support
+device loop
+
+# ether device support
+device ether
+
+# ether switch support
+#device etherswitch
+#device miibus
+#device ip17x
+#device mdio
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