+// SPDX-License-Identifier: GPL-2.0+
/*
* PCI emulation device which swaps the case of text
*
* Copyright (c) 2014 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
*/
struct swap_case_platdata {
u16 command;
- u32 bar[2];
+ u32 bar[6];
};
#define offset_to_barnum(offset) \
return plat->devfn;
}
+static int sandbox_swap_case_use_ea(struct udevice *dev)
+{
+ return !!ofnode_get_property(dev->node, "use-ea", NULL);
+}
+
+/* Please keep these macros in sync with ea_regs below */
+#define PCI_CAP_ID_EA_SIZE (sizeof(ea_regs) + 4)
+#define PCI_CAP_ID_EA_ENTRY_CNT 4
+/* Hardcoded EA structure, excluding 1st DW. */
+static const u32 ea_regs[] = {
+ /* BEI=0, ES=2, BAR0 32b Base + 32b MaxOffset, I/O space */
+ (2 << 8) | 2,
+ PCI_CAP_EA_BASE_LO0,
+ 0,
+ /* BEI=1, ES=2, BAR1 32b Base + 32b MaxOffset */
+ (1 << 4) | 2,
+ PCI_CAP_EA_BASE_LO1,
+ MEM_TEXT_SIZE - 1,
+ /* BEI=2, ES=3, BAR2 64b Base + 32b MaxOffset */
+ (2 << 4) | 3,
+ PCI_CAP_EA_BASE_LO2 | PCI_EA_IS_64,
+ PCI_CAP_EA_SIZE_LO,
+ PCI_CAP_EA_BASE_HI2,
+ /* BEI=4, ES=4, BAR4 64b Base + 64b MaxOffset */
+ (4 << 4) | 4,
+ PCI_CAP_EA_BASE_LO4 | PCI_EA_IS_64,
+ PCI_CAP_EA_SIZE_LO | PCI_EA_IS_64,
+ PCI_CAP_EA_BASE_HI4,
+ PCI_CAP_EA_SIZE_HI,
+};
+
+static int sandbox_swap_case_read_ea(struct udevice *emul, uint offset,
+ ulong *valuep, enum pci_size_t size)
+{
+ u32 reg;
+
+ offset = offset - PCI_CAP_ID_EA_OFFSET - 4;
+ reg = ea_regs[offset >> 2];
+ reg >>= (offset % 4) * 8;
+
+ *valuep = reg;
+ return 0;
+}
+
static int sandbox_swap_case_read_config(struct udevice *emul, uint offset,
ulong *valuep, enum pci_size_t size)
{
struct swap_case_platdata *plat = dev_get_platdata(emul);
+ /*
+ * The content of the EA capability structure is handled elsewhere to
+ * keep the switch/case below sane
+ */
+ if (offset > PCI_CAP_ID_EA_OFFSET + PCI_CAP_LIST_NEXT &&
+ offset < PCI_CAP_ID_EA_OFFSET + PCI_CAP_ID_EA_SIZE)
+ return sandbox_swap_case_read_ea(emul, offset, valuep, size);
+
switch (offset) {
case PCI_COMMAND:
*valuep = plat->command;
*valuep = result;
break;
}
+ case PCI_CAPABILITY_LIST:
+ *valuep = PCI_CAP_ID_PM_OFFSET;
+ break;
+ case PCI_CAP_ID_PM_OFFSET:
+ *valuep = (PCI_CAP_ID_EXP_OFFSET << 8) | PCI_CAP_ID_PM;
+ break;
+ case PCI_CAP_ID_PM_OFFSET + PCI_CAP_LIST_NEXT:
+ *valuep = PCI_CAP_ID_EXP_OFFSET;
+ break;
+ case PCI_CAP_ID_EXP_OFFSET:
+ *valuep = (PCI_CAP_ID_MSIX_OFFSET << 8) | PCI_CAP_ID_EXP;
+ break;
+ case PCI_CAP_ID_EXP_OFFSET + PCI_CAP_LIST_NEXT:
+ *valuep = PCI_CAP_ID_MSIX_OFFSET;
+ break;
+ case PCI_CAP_ID_MSIX_OFFSET:
+ if (sandbox_swap_case_use_ea(emul))
+ *valuep = (PCI_CAP_ID_EA_OFFSET << 8) | PCI_CAP_ID_MSIX;
+ else
+ *valuep = PCI_CAP_ID_MSIX;
+ break;
+ case PCI_CAP_ID_MSIX_OFFSET + PCI_CAP_LIST_NEXT:
+ if (sandbox_swap_case_use_ea(emul))
+ *valuep = PCI_CAP_ID_EA_OFFSET;
+ else
+ *valuep = 0;
+ break;
+ case PCI_CAP_ID_EA_OFFSET:
+ *valuep = (PCI_CAP_ID_EA_ENTRY_CNT << 16) | PCI_CAP_ID_EA;
+ break;
+ case PCI_CAP_ID_EA_OFFSET + PCI_CAP_LIST_NEXT:
+ *valuep = 0;
+ break;
+ case PCI_EXT_CAP_ID_ERR_OFFSET:
+ *valuep = (PCI_EXT_CAP_ID_VC_OFFSET << 20) | PCI_EXT_CAP_ID_ERR;
+ break;
+ case PCI_EXT_CAP_ID_VC_OFFSET:
+ *valuep = (PCI_EXT_CAP_ID_DSN_OFFSET << 20) | PCI_EXT_CAP_ID_VC;
+ break;
+ case PCI_EXT_CAP_ID_DSN_OFFSET:
+ *valuep = PCI_EXT_CAP_ID_DSN;
+ break;
}
return 0;
debug("w bar %d=%lx\n", barnum, value);
*bar = value;
+ /* space indicator (bit#0) is read-only */
+ *bar |= barinfo[barnum].type;
break;
}
}
for (barnum = 0; barnum < ARRAY_SIZE(barinfo); barnum++) {
unsigned int size = barinfo[barnum].size;
+ u32 base = plat->bar[barnum] & ~PCI_BASE_ADDRESS_SPACE;
- if (addr >= plat->bar[barnum] &&
- addr < plat->bar[barnum] + size) {
+ if (addr >= base && addr < base + size) {
*barnump = barnum;
- *offsetp = addr - plat->bar[barnum];
+ *offsetp = addr - base;
return 0;
}
}
return 0;
}
+static int pci_ea_bar2_magic = PCI_EA_BAR2_MAGIC;
+static int pci_ea_bar4_magic = PCI_EA_BAR4_MAGIC;
+
static int sandbox_swap_case_map_physmem(struct udevice *dev,
phys_addr_t addr, unsigned long *lenp, void **ptrp)
{
int barnum;
int ret;
+ if (sandbox_swap_case_use_ea(dev)) {
+ /*
+ * only support mapping base address in EA test for now, we
+ * don't handle mapping an offset inside a BAR. Seems good
+ * enough for the current test.
+ */
+ switch (addr) {
+ case (phys_addr_t)PCI_CAP_EA_BASE_LO0:
+ *ptrp = &priv->op;
+ *lenp = 4;
+ break;
+ case (phys_addr_t)PCI_CAP_EA_BASE_LO1:
+ *ptrp = priv->mem_text;
+ *lenp = barinfo[1].size - 1;
+ break;
+ case (phys_addr_t)((PCI_CAP_EA_BASE_HI2 << 32) |
+ PCI_CAP_EA_BASE_LO2):
+ *ptrp = &pci_ea_bar2_magic;
+ *lenp = PCI_CAP_EA_SIZE_LO;
+ break;
+ case (phys_addr_t)((PCI_CAP_EA_BASE_HI4 << 32) |
+ PCI_CAP_EA_BASE_LO4):
+ *ptrp = &pci_ea_bar4_magic;
+ *lenp = (PCI_CAP_EA_SIZE_HI << 32) |
+ PCI_CAP_EA_SIZE_LO;
+ break;
+ default:
+ return -ENOENT;
+ }
+ return 0;
+ }
+
ret = sandbox_swap_case_find_bar(dev, addr, &barnum, &offset);
if (ret)
return ret;
+
if (barnum == 1) {
*ptrp = priv->mem_text + offset;
avail = barinfo[1].size - offset;
.priv_auto_alloc_size = sizeof(struct swap_case_priv),
.platdata_auto_alloc_size = sizeof(struct swap_case_platdata),
};
+
+static struct pci_device_id sandbox_swap_case_supported[] = {
+ { PCI_VDEVICE(SANDBOX, SANDBOX_PCI_DEVICE_ID), SWAP_CASE_DRV_DATA },
+ {},
+};
+
+U_BOOT_PCI_DEVICE(sandbox_swap_case_emul, sandbox_swap_case_supported);
projects / oweals / u-boot.git / blobdiff