Re: [Qemu-devel] [PATCH 04/15] ebus: convert to pci_bar_map

[Blue Swirl <blauwirbel@gmail.com>]

On Mon, Jul 12, 2010 at 7:03 PM, Artyom Tarasenko
<atar4qemu@googlemail.com> wrote:
> 2010/7/12 Blue Swirl <blauwirbel@gmail.com>:
>> Use pci_bar_map() instead of a mapping function.
>>
>> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
>> ---
>>  hw/isa.h      |    1 +
>>  hw/isa_mmio.c |   17 +++++++++++++++--
>>  hw/sun4u.c    |   29 ++++++++++-------------------
>>  3 files changed, 26 insertions(+), 21 deletions(-)
>>
>> diff --git a/hw/isa.h b/hw/isa.h
>> index aaf0272..6fba4ac 100644
>> --- a/hw/isa.h
>> +++ b/hw/isa.h
>> @@ -33,6 +33,7 @@ ISADevice *isa_create_simple(const char *name);
>>  extern target_phys_addr_t isa_mem_base;
>>
>>  void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size, int be);
>> +int pci_isa_mmio_init(int be);
>>
>>  /* dma.c */
>>  int DMA_get_channel_mode (int nchan);
>> diff --git a/hw/isa_mmio.c b/hw/isa_mmio.c
>> index 66bdd2c..3b2de4a 100644
>> --- a/hw/isa_mmio.c
>> +++ b/hw/isa_mmio.c
>> @@ -125,7 +125,7 @@ static CPUReadMemoryFunc * const isa_mmio_read_le[] = {
>>
>>  static int isa_mmio_iomemtype = 0;
>>
>> -void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size, int be)
>> +static int isa_mmio_memtype(int be)
>>  {
>>     if (!isa_mmio_iomemtype) {
>>         if (be) {
>> @@ -138,5 +138,18 @@ void isa_mmio_init(target_phys_addr_t base,
>> target_phys_addr_t size, int be)
>>                                                         NULL);
>>         }
>>     }
>> -    cpu_register_physical_memory(base, size, isa_mmio_iomemtype);
>> +    return isa_mmio_iomemtype;
>> +}
>> +
>> +void isa_mmio_init(target_phys_addr_t base, target_phys_addr_t size, int be)
>> +{
>> +    int isa;
>> +
>> +    isa = isa_mmio_memtype(be);
>> +    cpu_register_physical_memory(base, size, isa);
>> +}
>> +
>> +int pci_isa_mmio_init(int be)
>> +{
>> +    return isa_mmio_memtype(be);
>>  }
>> diff --git a/hw/sun4u.c b/hw/sun4u.c
>> index 31c0c4c..8565243 100644
>> --- a/hw/sun4u.c
>> +++ b/hw/sun4u.c
>> @@ -517,21 +517,6 @@ void cpu_tick_set_limit(CPUTimer *timer, uint64_t limit)
>>     }
>>  }
>>
>> -static void ebus_mmio_mapfunc(PCIDevice *pci_dev, int region_num,
>> -                              pcibus_t addr, pcibus_t size, int type)
>> -{
>> -    EBUS_DPRINTF("Mapping region %d registers at %" FMT_PCIBUS "\n",
>> -                 region_num, addr);
>> -    switch (region_num) {
>> -    case 0:
>> -        isa_mmio_init(addr, 0x1000000, 1);
>> -        break;
>> -    case 1:
>> -        isa_mmio_init(addr, 0x800000, 1);
>> -        break;
>> -    }
>> -}
>> -
>>  static void dummy_isa_irq_handler(void *opaque, int n, int level)
>>  {
>>  }
>> @@ -550,6 +535,8 @@ pci_ebus_init(PCIBus *bus, int devfn)
>>  static int
>>  pci_ebus_init1(PCIDevice *s)
>>  {
>> +    int io_index;
>> +
>>     isa_bus_new(&s->qdev);
>>
>>     pci_config_set_vendor_id(s->config, PCI_VENDOR_ID_SUN);
>> @@ -563,10 +550,14 @@ pci_ebus_init1(PCIDevice *s)
>>     pci_config_set_class(s->config, PCI_CLASS_BRIDGE_OTHER);
>>     s->config[0x0D] = 0x0a; // latency_timer
>>
>> -    pci_register_bar(s, 0, 0x1000000, PCI_BASE_ADDRESS_SPACE_MEMORY,
>> -                           ebus_mmio_mapfunc);
>> -    pci_register_bar(s, 1, 0x800000,  PCI_BASE_ADDRESS_SPACE_MEMORY,
>> -                           ebus_mmio_mapfunc);
>> +    pci_register_bar(s, 0, 0x1000000, PCI_BASE_ADDRESS_SPACE_MEMORY, NULL);
>> +    io_index = pci_isa_mmio_init(1);
>> +    pci_bar_map(s, 0, 0, 0, 0x1000000, io_index);
>> +
>> +    pci_register_bar(s, 1, 0x800000, PCI_BASE_ADDRESS_SPACE_MEMORY, NULL);
>> +    io_index = pci_isa_mmio_init(1);
>> +    pci_bar_map(s, 1, 0, 0, 0x800000, io_index);
>
> Are these well-known constants?

IIRC I picked them from device tree range sizes:
                ranges:
00000010.00000000.82010810.00000000.f0000000.01000000.00000014.00000000.82010814.00000000.f1000000.00800000

It's a bit annoying to repeat the constants, but this is a simple case
where the subregion size is equal to the whole BAR size.