diff options
author | Will Deacon <will.deacon@arm.com> | 2013-05-01 16:50:13 +0100 |
---|---|---|
committer | Will Deacon <will.deacon@arm.com> | 2015-06-01 16:39:54 +0100 |
commit | d28abb583a1c999a9755029e59714adcad3f518f (patch) | |
tree | 7bd987369312aa9473df1a4a5750ca5426025a59 /hw | |
parent | bb7b03f3854de5c0e6c9cc48bce13033bd85c6a2 (diff) | |
download | kvmtool-d28abb583a1c999a9755029e59714adcad3f518f.tar.gz |
kvm tools: 8250: add fdt node generation
This patch adds fdt node generation to the 8250 emulation. The
serial8250_device is now stashed inside the ioport priv field, so that
it can be retrieved from the ioport passed back to the generation code.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/serial.c | 55 |
1 files changed, 29 insertions, 26 deletions
diff --git a/hw/serial.c b/hw/serial.c index 384ee37b..523a7672 100644 --- a/hw/serial.c +++ b/hw/serial.c @@ -6,6 +6,7 @@ #include "kvm/util.h" #include "kvm/term.h" #include "kvm/kvm.h" +#include "kvm/fdt.h" #include <linux/types.h> #include <linux/serial_reg.h> @@ -226,31 +227,14 @@ void serial8250__inject_sysrq(struct kvm *kvm, char sysrq) sysrq_pending = sysrq; } -static struct serial8250_device *find_device(u16 port) -{ - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(devices); i++) { - struct serial8250_device *dev = &devices[i]; - - if (dev->iobase == (port & ~0x7)) - return dev; - } - return NULL; -} - static bool serial8250_out(struct ioport *ioport, struct kvm *kvm, u16 port, void *data, int size) { - struct serial8250_device *dev; + struct serial8250_device *dev = ioport->priv; u16 offset; bool ret = true; char *addr = data; - dev = find_device(port); - if (!dev) - return false; - mutex_lock(&dev->mutex); offset = port - dev->iobase; @@ -338,14 +322,10 @@ static void serial8250_rx(struct serial8250_device *dev, void *data) static bool serial8250_in(struct ioport *ioport, struct kvm *kvm, u16 port, void *data, int size) { - struct serial8250_device *dev; + struct serial8250_device *dev = ioport->priv; u16 offset; bool ret = true; - dev = find_device(port); - if (!dev) - return false; - mutex_lock(&dev->mutex); offset = port - dev->iobase; @@ -393,9 +373,32 @@ static bool serial8250_in(struct ioport *ioport, struct kvm *kvm, u16 port, void return ret; } +#ifdef CONFIG_HAS_LIBFDT +static void serial8250_generate_fdt_node(struct ioport *ioport, void *fdt, + void (*generate_irq_prop)(void *fdt, + u8 irq)) +{ + struct serial8250_device *dev = ioport->priv; + u64 reg_prop[] = { + cpu_to_fdt64(KVM_IOPORT_AREA + dev->iobase), + cpu_to_fdt64(8), + }; + + _FDT(fdt_begin_node(fdt, "U6_16550A")); + _FDT(fdt_property_string(fdt, "compatible", "ns16550a")); + _FDT(fdt_property(fdt, "reg", reg_prop, sizeof(reg_prop))); + generate_irq_prop(fdt, dev->irq); + _FDT(fdt_property_cell(fdt, "clock-frequency", 1843200)); + _FDT(fdt_end_node(fdt)); +} +#else +#define serial8250_generate_fdt_node NULL +#endif + static struct ioport_operations serial8250_ops = { - .io_in = serial8250_in, - .io_out = serial8250_out, + .io_in = serial8250_in, + .io_out = serial8250_out, + .generate_fdt_node = serial8250_generate_fdt_node, }; static int serial8250__device_init(struct kvm *kvm, struct serial8250_device *dev) @@ -403,7 +406,7 @@ static int serial8250__device_init(struct kvm *kvm, struct serial8250_device *de int r; ioport__map_irq(&dev->irq); - r = ioport__register(kvm, dev->iobase, &serial8250_ops, 8, NULL); + r = ioport__register(kvm, dev->iobase, &serial8250_ops, 8, dev); kvm__irq_line(kvm, dev->irq, 0); return r; |