GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
21813 changed files with 4413081 additions and 0 deletions
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Support for indirect PCI bridges.
+ *
+ * Copyright (C) 1998 Gabriel Paubert.
+ */
+
+#include <common.h>
+
+#if !defined(__I386__) && !defined(CONFIG_DM_PCI)
+
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <pci.h>
+
+#define cfg_read(val, addr, type, op)	*val = op((type)(addr))
+#define cfg_write(val, addr, type, op)	op((type *)(addr), (val))
+
+#if defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
+#define INDIRECT_PCI_OP(rw, size, type, op, mask)                        \
+static int                                                               \
+indirect_##rw##_config_##size(struct pci_controller *hose,               \
+			      pci_dev_t dev, int offset, type val)       \
+{                                                                        \
+	u32 b, d,f;							 \
+	b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);		 \
+	b = b - hose->first_busno;					 \
+	dev = PCI_BDF(b, d, f);						 \
+	*(hose->cfg_addr) = dev | (offset & 0xfc) | ((offset & 0xf00) << 16) | 0x80000000; \
+	sync();                                                          \
+	cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);       \
+	return 0;                                                        \
+}
+#else
+#define INDIRECT_PCI_OP(rw, size, type, op, mask)			 \
+static int								 \
+indirect_##rw##_config_##size(struct pci_controller *hose,		 \
+			      pci_dev_t dev, int offset, type val)	 \
+{									 \
+	u32 b, d,f;							 \
+	b = PCI_BUS(dev); d = PCI_DEV(dev); f = PCI_FUNC(dev);		 \
+	b = b - hose->first_busno;					 \
+	dev = PCI_BDF(b, d, f);						 \
+	out_le32(hose->cfg_addr, dev | (offset & 0xfc) | 0x80000000);	 \
+	cfg_##rw(val, hose->cfg_data + (offset & mask), type, op);	 \
+	return 0;							 \
+}
+#endif
+
+INDIRECT_PCI_OP(read, byte, u8 *, in_8, 3)
+INDIRECT_PCI_OP(read, word, u16 *, in_le16, 2)
+INDIRECT_PCI_OP(read, dword, u32 *, in_le32, 0)
+INDIRECT_PCI_OP(write, byte, u8, out_8, 3)
+INDIRECT_PCI_OP(write, word, u16, out_le16, 2)
+INDIRECT_PCI_OP(write, dword, u32, out_le32, 0)
+
+void pci_setup_indirect(struct pci_controller* hose, u32 cfg_addr, u32 cfg_data)
+{
+	pci_set_ops(hose,
+		    indirect_read_config_byte,
+		    indirect_read_config_word,
+		    indirect_read_config_dword,
+		    indirect_write_config_byte,
+		    indirect_write_config_word,
+		    indirect_write_config_dword);
+
+	hose->cfg_addr = (unsigned int *) cfg_addr;
+	hose->cfg_data = (unsigned char *) cfg_data;
+}
+
+#endif	/* !__I386__ */