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 < matthias.la...@kernkonzept.com> 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 <gail...@gmail.com > > <mailto:gail...@gmail.com>> wrote: > > > > Sorry for typo. I meant 8250 instead of 8050 in last email > > > > On Wed, Mar 1, 2017 at 3:21 PM, Gailu Singh <gail...@gmail.com > > <mailto:gail...@gmail.com>> 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 > > <matthias.la...@kernkonzept.com > > <mailto:matthias.la...@kernkonzept.com>> 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 < > gail...@gmail.com <mailto:gail...@gmail.com>> 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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