libaml: new io interface, add amlnew()/amltake()/amldrop(), late binding names, FindSetLeftBit/FindSetRightBit

new io interface was added. user defines amlmapio() and amlunmapio() functions
that will fill out Amlio structure with function pointers to read/write
routines for a particular region.

amlnew() function added allowing the creation of aml objects like buffers
or packages. these can be passed to amleval() with b, p or * format.

amltake()/amldrop() exclude an aml object from garbage collection.

on load, names are not always resolvable until the whole table is loaded.
for this, we create n objects that are just name strings. after load, we
recursively traverse the namespace and resolve them (see fixnames()).

the FindSetLeftBit and FindSetRightBit opcodes got implemened.

1 files changed, 37 insertions, 0 deletions

diff --git a/sys/include/aml.h b/sys/include/aml.h
index e1cd9c335..915e1e4e2 100644
--- a/sys/include/aml.h
+++ b/sys/include/aml.h
@@ -4,6 +4,7 @@
 /*
  *	b	uchar*	buffer		amllen() returns number of bytes
  *	s	char*	string		amllen() is strlen()
+ *	n	char*	undefined name	amllen() is strlen()
  *	i	uvlong*	integer
  *	p	void**	package		amllen() is # of elements
  *	r	void*	region
@@ -17,6 +18,8 @@ void*		amlval(void *);
 uvlong		amlint(void *);
 int		amllen(void *);
 
+void*		amlnew(char tag, int len);
+
 void		amlinit(void);
 void		amlexit(void);
 
@@ -25,6 +28,12 @@ void*		amlwalk(void *dot, char *name);
 int		amleval(void *dot, char *fmt, ...);
 void		amlenum(void *dot, char *seg, int (*proc)(void *, void *), void *arg);
 
+/*
+ * exclude from garbage collection
+ */
+void		amltake(void *);
+void		amldrop(void *);
+
 void*		amlroot;
 int		amldebug;
 
@@ -34,3 +43,31 @@ int		amldebug;
 /* to be provided by operating system */
 extern void*	amlalloc(int);
 extern void	amlfree(void*);
+
+enum {
+	MemSpace	= 0x00,
+	IoSpace		= 0x01,
+	PcicfgSpace	= 0x02,
+	EbctlSpace	= 0x03,
+	SmbusSpace	= 0x04,
+	CmosSpace	= 0x05,
+	PcibarSpace	= 0x06,
+	IpmiSpace	= 0x07,
+};
+
+typedef struct Amlio Amlio;
+struct Amlio
+{
+	int	space;
+	uvlong	off;
+	uvlong	len;
+	void	*name;
+	uchar	*va;
+
+	void	*aux;
+	int	(*read)(Amlio *io, void *data, int len, int off);
+	int	(*write)(Amlio *io, void *data, int len, int off);
+};
+
+extern int	amlmapio(Amlio *io);
+extern void	amlunmapio(Amlio *io);