Build problem was due to not running ./configure. I only did make clean and
make. Build issue is now resolved after running configure. Only cosmetic
change in your patch.
=============
static void
read_bars(grub_pci_device_t dev, struct grub_serial_board *board)
{
for (unsigned bar = 0; bar < NUM_BARS; ++bar)
changed to
=============
static void
read_bars(grub_pci_device_t dev, struct grub_serial_board *board)
{
unsigned bar;
for (bar = 0; bar < NUM_BARS; ++bar)
============
I was getting error for C99 enforcement error during build(‘for’ loop
initial declarations are only allowed in C99 mode)
I will check PCI vendor ID and Device ID and get back to you.
On Wed, Mar 1, 2017 at 4:27 PM, Matthias Lange <
[email protected]> wrote:
> On 03/01/2017 11:32 AM, Gailu Singh wrote:
> > I checked coreboot where in the memory it is mapped and it seems to be
> > on PCIE. Relevant code from coreboot. So I am hopeful that patch will
> work.
> > ---------
> > uintptr_t uart_platform_base(int idx)
> > {
> > u8 *pcie;
> > u32 tmp;
> > idx = idx & 3;
> > pcie = (u8 *)PCIE_MMIO(0, PCH_DEV_SLOT_UART, idx, 0);
> > tmp = read32 (pcie + PCI_BASE_ADDRESS_0);
> > if (tmp == 0xFFFFFFFF) {
> > /* the device might be hidden */
> > return LPSS_UART_BASE_ADDRESS;
> > } else {
> > return (uintptr_t) (tmp & 0xFFFFFFF0);
> > }
> > }
> > ---------
>
> This looks promising. Could you extract the PCI vendor and device ID
> please? My current implementation currently only supports OXSemi chips.
>
> > I applied the patches and run make clean followed by make but build
> > failed as follows
> > ------------------------
> > cat syminfo.lst | sort | gawk -f ./genmoddep.awk > moddep.lst || (rm -f
> > moddep.lst; exit 1)
> > grub_ns8250_pci_mmio_init in serial is not defined
> > make[3]: *** [moddep.lst] Error 1
> > ------------------------
>
> Hmmm, grub_ns8250_pci_mmio_init is defined in include/grub/serial.h.
> Could you check that please? I failed to reproduce your problem, maybe I
> did something different?
>
> (master checked out)
> /tmp/grub $ /path/to/grub-src/configure --with-platform=efi
> /tmp/grub $ make -j12 # success
> (applied my three patches)
> /tmp/grub $ make clean
> /tmp/grub $ make -j12 # success
>
> Matthias.
>
> > On Wed, Mar 1, 2017 at 3:27 PM, Gailu Singh <[email protected]
> > <mailto:[email protected]>> wrote:
> >
> > Sorry for typo. I meant 8250 instead of 8050 in last email
> >
> > On Wed, Mar 1, 2017 at 3:21 PM, Gailu Singh <[email protected]
> > <mailto:[email protected]>> wrote:
> >
> > My board is Intel Oxbohill CRB (Apollo lake). On my board UART
> > are not connected to PCI.
> >
> > I am using grub2 payload loaded by coreboot. UART works fine in
> > coreboot by using memory mapped 8050 driver
> > (https://github.com/coreboot/coreboot/blob/master/src/
> drivers/uart/uart8250mem.c
> > <https://github.com/coreboot/coreboot/blob/master/src/
> drivers/uart/uart8250mem.c>),
> > however when grub2 is loaded it refuses to recognize UART.
> >
> >
> >
> > On Wed, Mar 1, 2017 at 3:08 PM, Matthias Lange
> > <[email protected]
> > <mailto:[email protected]>> wrote:
> >
> > Hi,
> >
> > On 03/01/2017 08:00 AM, Andrei Borzenkov wrote:
> > > please test patches from Matthias Lange
> > >
> > > https://lists.gnu.org/archive/html/grub-devel/2017-02/
> msg00104.html
> > <https://lists.gnu.org/archive/html/grub-devel/2017-
> 02/msg00104.html>
> > >
> > >
> > > On Wed, Mar 1, 2017 at 9:15 AM, Gailu Singh <
> [email protected] <mailto:[email protected]>> wrote:
> > >> Hi Experts,
> > >>
> > >> I am using GRUB2 on intel apollo lake board. This board
> does not have IO
> > >> mapped uart instead it has 8250 memory mapped UART.
> >
> > Could you share some details about the board?
> >
> > >> GRUB2 does not recognize memory mapped uart and gives
> error ("serial port
> > >> COM0 not found). There is a 8250 memory mapped driver
> available in coreboot.
> > >> Is it possible to port that driver to Grub2?
> >
> > My patch set adds support for 8250 MMIO PCI cards. Is the
> > UART on your
> > board connected via PCI?
> >
> > Best,
> > Matthias.
>
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