On Fri, Sep 16, 2022 at 5:26 PM Bin Meng <bmeng...@gmail.com> wrote:
> On Thu, Sep 15, 2022 at 11:30 PM Bernhard Beschow <shen...@gmail.com>
> wrote:
> >
> > Adds missing functionality to emulated e500 SOCs which increases the
> > chance of given "real" firmware images to access SD cards.
>
> By "firmware" do you mean U-Boot?
>
No, I mean a proprietary flash blob including partitions for the kernel,
root fs, U-Boot, etc.
>
> > Signed-off-by: Bernhard Beschow <shen...@gmail.com>
> > ---
> > docs/system/ppc/ppce500.rst | 13 +++++++++++++
> > hw/ppc/Kconfig | 1 +
> > hw/ppc/e500.c | 32 ++++++++++++++++++++++++++++++++
> > 3 files changed, 46 insertions(+)
> >
> > diff --git a/docs/system/ppc/ppce500.rst b/docs/system/ppc/ppce500.rst
> > index c3f55c6f3d..50b199c8f3 100644
> > --- a/docs/system/ppc/ppce500.rst
> > +++ b/docs/system/ppc/ppce500.rst
> > @@ -19,6 +19,7 @@ The ``ppce500`` machine supports the following devices:
> > * Power-off functionality via one GPIO pin
> > * 1 Freescale MPC8xxx PCI host controller
> > * VirtIO devices via PCI bus
> > +* 1 Freescale Enhanced Secure Digital Host controller (eSDHC)
> > * 1 Freescale Enhanced Triple Speed Ethernet controller (eTSEC)
> >
> > Hardware configuration information
> > @@ -131,6 +132,18 @@ be used as follows:
> > -drive if=pflash,file=/path/to/rootfs.ext2,format=raw \
> > -append "rootwait root=/dev/mtdblock0"
> >
> > +Alternatively, the root file system can also reside on an emulated SD
> card
> > +whose size must again be a power of two:
> > +
> > +.. code-block:: bash
> > +
> > + $ qemu-system-ppc64 -M ppce500 -cpu e500mc -smp 4 -m 2G \
>
> qemu-system-ppc{64|32}
>
Will fix.
> > + -display none -serial stdio \
> > + -kernel vmlinux \
> > + -device sd-card,drive=mydrive \
> > + -drive id=mydrive,if=none,file=/path/to/rootfs.ext2,format=raw \
> > + -append "rootwait root=/dev/mmcblk0"
> > +
> > Running U-Boot
> > --------------
> >
> > diff --git a/hw/ppc/Kconfig b/hw/ppc/Kconfig
> > index 769a1ead1c..6e31f568ba 100644
> > --- a/hw/ppc/Kconfig
> > +++ b/hw/ppc/Kconfig
> > @@ -129,6 +129,7 @@ config E500
> > select PFLASH_CFI01
> > select PLATFORM_BUS
> > select PPCE500_PCI
> > + select SDHCI
> > select SERIAL
> > select MPC_I2C
> > select FDT_PPC
> > diff --git a/hw/ppc/e500.c b/hw/ppc/e500.c
> > index 7843a4e04b..87a03fd4a9 100644
> > --- a/hw/ppc/e500.c
> > +++ b/hw/ppc/e500.c
> > @@ -48,6 +48,7 @@
> > #include "hw/net/fsl_etsec/etsec.h"
> > #include "hw/i2c/i2c.h"
> > #include "hw/irq.h"
> > +#include "hw/sd/sdhci.h"
> >
> > #define EPAPR_MAGIC (0x45504150)
> > #define DTC_LOAD_PAD 0x1800000
> > @@ -66,11 +67,14 @@
> > #define MPC8544_SERIAL1_REGS_OFFSET 0x4600ULL
> > #define MPC8544_PCI_REGS_OFFSET 0x8000ULL
> > #define MPC8544_PCI_REGS_SIZE 0x1000ULL
> > +#define MPC85XX_ESDHC_REGS_OFFSET 0x2e000ULL
> > +#define MPC85XX_ESDHC_REGS_SIZE 0x1000ULL
> > #define MPC8544_UTIL_OFFSET 0xe0000ULL
> > #define MPC8XXX_GPIO_OFFSET 0x000FF000ULL
> > #define MPC8544_I2C_REGS_OFFSET 0x3000ULL
> > #define MPC8XXX_GPIO_IRQ 47
> > #define MPC8544_I2C_IRQ 43
> > +#define MPC85XX_ESDHC_IRQ 72
> > #define RTC_REGS_OFFSET 0x68
> >
> > #define PLATFORM_CLK_FREQ_HZ (400 * 1000 * 1000)
> > @@ -203,6 +207,25 @@ static void dt_i2c_create(void *fdt, const char
> *soc, const char *mpic,
> > g_free(i2c);
> > }
> >
> > +static void dt_sdhc_create(void *fdt, const char *parent, const char
> *mpic)
> > +{
> > + hwaddr mmio = MPC85XX_ESDHC_REGS_OFFSET;
> > + hwaddr size = MPC85XX_ESDHC_REGS_SIZE;
> > + int irq = MPC85XX_ESDHC_IRQ;
> > + char *name;
> > +
> > + name = g_strdup_printf("%s/sdhc@%" PRIx64, parent, mmio);
> > + qemu_fdt_add_subnode(fdt, name);
> > + /* qemu_fdt_setprop_cells(fdt, name, "voltage-ranges", 3300, 3300);
> */
>
> Drop it if it is useless
>
> > + qemu_fdt_setprop_cells(fdt, name, "clock-frequency", 167000000);
>
> Is this an arbitrary frequency?
>
I'll drop both since the eSDHC works also without the frequency line.
> + qemu_fdt_setprop(fdt, name, "sdhci,auto-cmd12", NULL, 0);
> > + qemu_fdt_setprop_phandle(fdt, name, "interrupt-parent", mpic);
> > + qemu_fdt_setprop_cells(fdt, name, "bus-width", 4);
> > + qemu_fdt_setprop_cells(fdt, name, "interrupts", irq, 0x2);
> > + qemu_fdt_setprop_cells(fdt, name, "reg", mmio, size);
> > + qemu_fdt_setprop_string(fdt, name, "compatible", "fsl,esdhc");
> > + g_free(name);
> > +}
> >
> > typedef struct PlatformDevtreeData {
> > void *fdt;
> > @@ -556,6 +579,8 @@ static int
> ppce500_load_device_tree(PPCE500MachineState *pms,
> >
> > dt_rtc_create(fdt, "i2c", "rtc");
> >
> > + /* sdhc */
> > + dt_sdhc_create(fdt, soc, mpic);
> >
> > gutil = g_strdup_printf("%s/global-utilities@%llx", soc,
> > MPC8544_UTIL_OFFSET);
> > @@ -996,6 +1021,13 @@ void ppce500_init(MachineState *machine)
> > i2c_slave_create_simple(i2c, "ds1338", RTC_REGS_OFFSET);
> >
> >
>
> nits: use one line for the separation
>
The extra empty line was there before and it looks like it came from moving
I2C around - notice the broken indentation of it's comment.
I'll fix that in this patch.
Best regards,
Bernhard
> + /* eSDHC */
> > + dev = qdev_new(TYPE_FSL_ESDHC);
> > + s = SYS_BUS_DEVICE(dev);
> > + sysbus_realize_and_unref(s, &error_fatal);
> > + sysbus_mmio_map(s, 0, pmc->ccsrbar_base +
> MPC85XX_ESDHC_REGS_OFFSET);
> > + sysbus_connect_irq(s, 0, qdev_get_gpio_in(mpicdev,
> MPC85XX_ESDHC_IRQ));
> > +
> > /* General Utility device */
> > dev = qdev_new("mpc8544-guts");
> > s = SYS_BUS_DEVICE(dev);
> > --
>
> Regards,
> Bin
>
